add wagons

Reviewed-on: #21

.idea/.gitignore

@@ -0,0 +1,13 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Rider ignored files
+/contentModel.xml
+/modules.xml
+/projectSettingsUpdater.xml
+/.idea.tgcc.iml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/encodings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with BOM under Windows, with no BOM otherwise" />
+</project>

.idea/indexLayout.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="UserContentModel">
+    <attachedFolders />
+    <explicitIncludes />
+    <explicitExcludes />
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

core/ai/agents/base/ai_base.gd

@@ -0,0 +1,58 @@
+extends CharacterBody3D
+
+class_name AIBase
+
+@export_group("Movement")
+@export var speed: float = 4.0
+var _enable_state_machine: bool = true
+@export var enable_state_machine: bool: 
+	set(value):
+		_enable_state_machine = value
+		toggle_enable_state_machine()
+	get:
+		return _enable_state_machine
+
+@onready var patrol_radius_shape: CollisionShape3D = $%PatrolRadiusShape
+@onready var nav_agent: NavigationAgent3D = $%NavigationAgent3D
+@onready var state_machine: StateMachine = $%StateMachine
+
+@export_group("Entities")
+enum EntityType { HUMANOID, ANIMAL }
+@export var entity_type: EntityType = EntityType.HUMANOID
+@export var entity_name: String = ""
+@export var allowed_biomes: Array[String] = []
+@export_range(0.0, 100.0, 0.1) var spawn_uniqueness: float = 1.0
+
+
+func _ready() -> void:
+	randomize()
+	toggle_enable_state_machine()
+
+func toggle_enable_state_machine() -> void:
+	state_machine.enable = _enable_state_machine
+
+func _physics_process(delta: float) -> void:
+	if !_enable_state_machine:
+		return
+
+	state_machine.physics_process(delta)
+
+	if nav_agent.is_navigation_finished():
+		velocity = Vector3.ZERO
+		move_and_slide()
+		return
+
+	var next_point = nav_agent.get_next_path_position()
+	var direction = global_position.direction_to(next_point)
+	
+	velocity.x = direction.x * speed
+	velocity.z = direction.z * speed
+	
+	move_and_slide()
+
+func navigate_to_random_point() -> void:
+	var nav_map_rid = get_world_3d().get_navigation_map()
+	var patrol_radius = patrol_radius_shape.shape.radius
+	var target_point_in_space = global_position + Vector3(randf_range(-1, 1), 0, randf_range(-1, 1)).normalized() * randf_range(0, patrol_radius)
+	var closest_valid_point = NavigationServer3D.map_get_closest_point(nav_map_rid, target_point_in_space)
+	nav_agent.target_position = closest_valid_point

core/ai/agents/base/ai_base.gd.uid

@@ -0,0 +1 @@
+uid://b30p1yqojbbbk

core/ai/agents/base/ai_base.tscn

@@ -0,0 +1,45 @@
+[gd_scene format=3 uid="uid://clx701xdwelgx"]
+
+[ext_resource type="Script" uid="uid://b30p1yqojbbbk" path="res://core/ai/agents/base/ai_base.gd" id="1_4d1nn"]
+[ext_resource type="Script" uid="uid://ps3vlu2qvmop" path="res://core/ai/framework/state_machine.gd" id="2_q1hg3"]
+[ext_resource type="Script" uid="uid://nga8qx56iwgu" path="res://core/ai/agents/base/idle_state.gd" id="3_26faq"]
+[ext_resource type="Script" uid="uid://bngfthvt04ivv" path="res://core/ai/agents/base/patrol_state.gd" id="4_lim44"]
+
+[sub_resource type="CapsuleMesh" id="CapsuleMesh_mh3lg"]
+
+[sub_resource type="CapsuleShape3D" id="CapsuleShape3D_mh3lg"]
+
+[sub_resource type="SphereShape3D" id="SphereShape3D_lim44"]
+radius = 20.0
+
+[node name="AiBase" type="CharacterBody3D" unique_id=1228675528]
+script = ExtResource("1_4d1nn")
+entity_name = "Humanoid"
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="." unique_id=214482161]
+mesh = SubResource("CapsuleMesh_mh3lg")
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="." unique_id=92811823]
+shape = SubResource("CapsuleShape3D_mh3lg")
+
+[node name="NavigationAgent3D" type="NavigationAgent3D" parent="." unique_id=1370024449]
+unique_name_in_owner = true
+
+[node name="StateMachine" type="Node" parent="." unique_id=1286404264 node_paths=PackedStringArray("initial_state")]
+unique_name_in_owner = true
+script = ExtResource("2_q1hg3")
+initial_state = NodePath("IdleState")
+
+[node name="IdleState" type="Node" parent="StateMachine" unique_id=763668255]
+script = ExtResource("3_26faq")
+state_id = &"idle"
+
+[node name="PatrolState" type="Node" parent="StateMachine" unique_id=2054606629]
+script = ExtResource("4_lim44")
+state_id = &"patrol"
+
+[node name="PatrolRadiusShape" type="CollisionShape3D" parent="." unique_id=1379515938]
+unique_name_in_owner = true
+shape = SubResource("SphereShape3D_lim44")
+disabled = true
+debug_color = Color(1, 1, 0, 1)

core/ai/agents/base/idle_state.gd

@@ -0,0 +1,26 @@
+extends State
+
+const PATROL_STATE_ID: StringName = &"patrol"
+
+@export var wait_time: float = 3.0
+
+var runtime_timer: Timer
+
+func enter() -> void:
+	runtime_timer = Timer.new()
+	runtime_timer.name = "IdleTimer"
+	add_child(runtime_timer)
+	runtime_timer.one_shot = true
+	runtime_timer.timeout.connect(_on_timer_timeout)
+	runtime_timer.start(wait_time)
+
+func exit() -> void:
+	if runtime_timer:
+		if runtime_timer.is_connected("timeout", _on_timer_timeout):
+			runtime_timer.timeout.disconnect(_on_timer_timeout)
+		
+		runtime_timer.queue_free()
+		runtime_timer = null
+
+func _on_timer_timeout() -> void:
+	transitioned.emit(self, PATROL_STATE_ID)

core/ai/agents/base/idle_state.gd.uid

@@ -0,0 +1 @@
+uid://nga8qx56iwgu

core/ai/agents/base/patrol_state.gd

@@ -0,0 +1,12 @@
+extends State
+
+const IDLE_STATE_ID: StringName = &"idle"
+
+@onready var agent: AIBase = owner
+
+func enter() -> void:
+	agent.navigate_to_random_point()
+
+func physics_update(_delta)  -> void:
+	if agent.nav_agent.is_navigation_finished():
+		transitioned.emit(self, IDLE_STATE_ID)

core/ai/agents/base/patrol_state.gd.uid

@@ -0,0 +1 @@
+uid://bngfthvt04ivv

core/ai/framework/state.gd

@@ -0,0 +1,20 @@
+extends Node
+
+class_name State
+
+@export var state_id: StringName = &""
+
+@warning_ignore("unused_signal")
+signal transitioned(state: State, new_state_id: StringName)
+
+func enter()  -> void:
+	pass
+
+func exit()  -> void:
+	pass
+
+func update(_delta)  -> void:
+	pass
+
+func physics_update(_delta)  -> void:
+	pass

core/ai/framework/state.gd.uid

@@ -0,0 +1 @@
+uid://dpso7abi5ftyw

core/ai/framework/state_machine.gd

@@ -0,0 +1,61 @@
+extends Node
+
+class_name StateMachine
+
+@export var initial_state: State
+
+var current_state: State
+var states: Dictionary[StringName, State] = {}
+var is_initialized: bool = false
+var _enabled: bool = true
+var enable: bool:
+	set(value):
+		_enabled = value
+		_set_enabled(value)
+	get:
+		return _enabled
+
+func _ready() -> void:
+	_initialize_states()
+	_set_enabled(enable)
+
+func _initialize_states() -> void:
+	if is_initialized:
+		return
+
+	for state in get_children():
+		if state is State:
+			states[state.state_id] = state
+			state.transitioned.connect(_on_state_transition)
+
+	is_initialized = true
+
+func _set_enabled(value: bool) -> void:
+	_enabled = value
+
+	if not _enabled:
+		return
+
+	_initialize_states()
+
+	if initial_state and current_state == null:
+		current_state = initial_state
+		current_state.enter()
+
+func physics_process(delta) -> void:
+	if current_state and _enabled:
+		current_state.physics_update(delta)
+
+func _on_state_transition(state: State, new_state_id: StringName) -> void:
+	if state != current_state:
+		return
+
+	var new_state = states.get(new_state_id)
+	if not new_state:
+		return
+
+	if current_state:
+		current_state.exit()
+	
+	current_state = new_state
+	current_state.enter()

core/ai/framework/state_machine.gd.uid

@@ -0,0 +1 @@
+uid://ps3vlu2qvmop

core/audio/audio_manager.gd

@@ -0,0 +1,31 @@
+extends Node
+
+const MIN_VOLUME: float = 0.0
+const MAX_VOLUME: float = 1.0
+
+func _ready() -> void:
+	load_save_data()
+
+func load_save_data() -> void:
+	for bus_name in GameState.save_data.audio_bus_volumes:
+		_apply_audio_bus_volume(bus_name, GameState.save_data.audio_bus_volumes[bus_name])
+
+func set_audio_bus_volume(bus_name: StringName, linear_value: float) -> void:
+	var normalized_bus_name := str(bus_name)
+	var clamped_value := clampf(linear_value, MIN_VOLUME, MAX_VOLUME)
+
+	GameState.save_data.audio_bus_volumes[normalized_bus_name] = clamped_value
+	_apply_audio_bus_volume(normalized_bus_name, clamped_value)
+	GameState.save_game()
+
+func get_audio_bus_volume(bus_name: StringName, default_value: float = 1.0) -> float:
+	return float(GameState.save_data.audio_bus_volumes.get(str(bus_name), default_value))
+
+func _apply_audio_bus_volume(bus_name: String, linear_value: float) -> void:
+	var bus_index := AudioServer.get_bus_index(bus_name)
+	if bus_index == -1:
+		return
+
+	var clamped_value := clampf(linear_value, MIN_VOLUME, MAX_VOLUME)
+	AudioServer.set_bus_volume_db(bus_index, linear_to_db(clamped_value))
+	AudioServer.set_bus_mute(bus_index, is_zero_approx(clamped_value))

core/audio/audio_manager.gd.uid

@@ -0,0 +1 @@
+uid://dcttbbavtwtsg

core/biome_generator/biome_generator.tscn

@@ -2,7 +2,9 @@
 
 [ext_resource type="Script" uid="uid://ct2k25kslaxe5" path="res://core/biome_generator/biome_generator.gd" id="1_c7ilo"]
 [ext_resource type="Material" uid="uid://b8p1sjxisi522" path="res://core/biome_generator/wires.tres" id="2_w42pm"]
+[ext_resource type="Resource" path="res://core/biome_generator/railway_pool.tres" id="3_railway_pool"]
 
 [node name="biome_generator" type="Node3D" unique_id=1861369341]
 script = ExtResource("1_c7ilo")
+railway_pool = ExtResource("3_railway_pool")
 lamppost_wire_material = ExtResource("2_w42pm")

core/biome_generator/chunk_info.gd

@@ -5,6 +5,7 @@ class_name ChunkInfo
 
 @export_group("Set Piece Rules (Unique pieces)")
 @export var exclusive_biome: String = "" # Es: "Forest"
+@export_range(0, 5, 1) var uniqueness: int = 0 #0=common; 5=unique
 
 @export_group("Base exit")
 @export var north: bool = false
@@ -12,6 +13,12 @@ class_name ChunkInfo
 @export var south: bool = false
 @export var west: bool = false
 
+@export_group("River exit")
+@export var river_north: bool = false
+@export var river_est: bool = false
+@export var river_south: bool = false
+@export var river_west: bool = false
+
 @export_group("Margin heights (level 0, 1, 2)")
 @export_range(0, 2, 1) var height_north: int = 0
 @export_range(0, 2, 1) var height_est: int = 0
@@ -29,14 +36,17 @@ func _ready() -> void:
 
 func get_rotated_data(steps_90: int) -> Dictionary:
 	var original_exit = [north, est, south, west]
+	var original_river_exit = [river_north, river_est, river_south, river_west]
 	var original_height = [height_north, height_est, height_south, height_west]
 	
 	var calculated_exit = []
+	var calculated_river_exit = []
 	var calculated_height = []
 	
 	for i in range(4):
 		var index  = (i - steps_90 + 4) % 4
 		calculated_exit.append(original_exit[index])
+		calculated_river_exit.append(original_river_exit[index])
 		calculated_height.append(original_height[index])
 		
 	return {
@@ -44,6 +54,10 @@ func get_rotated_data(steps_90: int) -> Dictionary:
 			"north": calculated_exit[0], "est": calculated_exit[1],
 			"south": calculated_exit[2], "west": calculated_exit[3]
 		},
+		"river_connections": {
+			"north": calculated_river_exit[0], "est": calculated_river_exit[1],
+			"south": calculated_river_exit[2], "west": calculated_river_exit[3]
+		},
 		"heights": {
 			"north": calculated_height[0], "est": calculated_height[1],
 			"south": calculated_height[2], "west": calculated_height[3]

core/biome_generator/entities_pool.tres

@@ -0,0 +1,9 @@
+[gd_resource type="Resource" script_class="EntityPool" format=3 uid="uid://cmd6s6thq4f7r"]
+
+[ext_resource type="PackedScene" uid="uid://clx701xdwelgx" path="res://core/ai/agents/base/ai_base.tscn" id="1_0kfj8"]
+[ext_resource type="Script" uid="uid://53ryr0fsqiq7" path="res://core/biome_generator/entity_pool.gd" id="1_vccp2"]
+
+[resource]
+script = ExtResource("1_vccp2")
+name = "Entity Pool"
+available_entities = Array[PackedScene]([ExtResource("1_0kfj8")])

core/biome_generator/entity_pool.gd

@@ -0,0 +1,5 @@
+extends Resource
+class_name EntityPool
+
+@export var name: String = "New Entity Pool"
+@export var available_entities: Array[PackedScene] = []

core/biome_generator/entity_pool.gd.uid

@@ -0,0 +1 @@
+uid://53ryr0fsqiq7

core/biome_generator/entity_spawn_point.gd

@@ -0,0 +1,8 @@
+extends Marker3D
+class_name EntitySpawnPoint
+
+enum AllowedType { ANY, HUMANOID_ONLY, ANIMAL_ONLY }
+
+@export var allowed_type: AllowedType = AllowedType.ANY
+@export_range(0.0, 1.0, 0.01) var spawn_chance: float = 1.0
+@export var random_y_rotation: bool = true

core/biome_generator/entity_spawn_point.gd.uid

@@ -0,0 +1 @@
+uid://c5ercbqy7srx3

core/biome_generator/prop_info.gd

@@ -0,0 +1,5 @@
+extends Marker3D
+class_name PropInfo
+
+@export var available_props: Array[PackedScene]
+@export_range(0, 5, 1) var uniqueness: int = 0 #0=common; 5=unique

core/biome_generator/prop_info.gd.uid

@@ -0,0 +1 @@
+uid://dg6ngy4pmtsyc

core/biome_generator/rails.gd

@@ -1,31 +1,60 @@
 extends Path3D
 
 @export_group("Train")
+##train speed
 @export var train_speed: float = 6.0	
+##if true the train is in motion
 @export var is_inmotion: bool = true	
+##the model for the locomotive
 @export var train_model: PackedScene 	
+##array of wagon scenes
+@export var wagon_pool: Resource		
+##if true the number of wagons is random from 1 to wagon_count
+@export var wagon_random_number: bool = true	
+##if wagon_random_number = true is used as max wagons
+@export_range(0, 32, 1, "or_greater") var wagon_count: int = 3 
+##the distance between two wagons
+@export var wagon_gap: float = 0.4 
+##the scale to calculate the distance of the bounds
+@export_range(0.1, 2.0, 0.05, "or_greater") var wagon_spacing_scale: float = 0.5 
+##override spacing using this value
+@export var wagon_spacing_override: float = 0.0
+##distance of the rail axes	
 @export var axes_distance: float = 3.0 
+##discance between rails
 @export var rail_distance: float = 1.2
+##current camera 
 @export var cameras: Node3D 
+##swing of the train during the ran
 @export_range(0.0, 1.0) var basic_swing: float = 0.1 
 
 @export_group("Rails Bulding")
+##distance between sleepers of the rails
 @export var sleepers_distance: float = 1.0
+##nodel for the sleeper of the rail
 @export var sleepers_model: PackedScene 
 
 @export_group("Manual Controls")
+##max speed
 @export var speed_max: float = 15.0
+##min speed
 @export var speed_min: float = -5.0
+##acceleration 
 @export var manual_acceleration: float = 5.0 
 
 @export_group("Train Stops")
+##if true the train stop the ran on stops
 @export var enable_stops: bool = true
+##time of stop
 @export var stop_time: float = 4.0 
+##distance when the train start to brake
 @export var brake_distance: float = 15.0
+##restart time 
 @export var restart_time: float = 3.0 
+##scene for fireworks
 @export var fireworks_scene: PackedScene 
-
-var fireworks_colors: Array[Color] = [
+##array of colors for fireworks
+@export var fireworks_colors: Array[Color] = [
 	Color(1.0, 0.2, 0.2), # Rosso vivo
 	Color(0.2, 1.0, 0.2), # Verde lime
 	Color(0.3, 0.5, 1.0), # Blu cielo
@@ -47,15 +76,119 @@ var next_stop_index: int = 0
 var stop_multiply: float = 1.0
 var is_restarting: bool = false
 var tween_restart: Tween
+var environment_config: EnvironmentConfig
+var wagon_instances: Array[Node3D] = []
+var wagon_progress_offsets: Array[float] = []
 
 func _ready() -> void:
+	randomize()
+	
+	_cache_environment_config()
+	
 	if curve != null and curve.get_baked_length() > 0:
 		build_rails()
 		build_train()
 		_plan_stops()
+		_apply_initial_train_start()
 	else:
 		print("WARNING: Draw Path3D for rails!")
 
+func _cache_environment_config() -> void:
+	var parent_node: Node = get_parent()
+	if parent_node != null:
+		var day_night_node := parent_node.get_node_or_null("DayNight") as EnvironmentManagerRoot
+		if day_night_node != null:
+			environment_config = day_night_node.environment_config
+			return
+
+	var current_scene: Node = get_tree().current_scene
+	if current_scene == null:
+		return
+
+	for child in current_scene.get_children():
+		var environment_manager := child as EnvironmentManagerRoot
+		if environment_manager != null:
+			environment_config = environment_manager.environment_config
+			return
+
+func _apply_initial_train_start() -> void:
+	if train_instance == null or curve == null:
+		return
+
+	var total_length: float = curve.get_baked_length()
+	if total_length <= 0.0:
+		return
+
+	#start from a random position
+	if environment_config != null and environment_config.train_start_from_random_position:
+		train_progress = randf() * total_length
+		_update_next_stop_index_from_progress()
+	elif environment_config != null and not stop_offset.is_empty():
+		#start from a specific stop
+		var stop_index: int = clampi(environment_config.train_start_stop_index, 0, stop_offset.size() - 1)
+		train_progress = stop_offset[stop_index]
+		_set_next_stop_index_from_current(stop_index)
+	else:
+		train_progress = wrapf(train_progress, 0.0, total_length)
+		_update_next_stop_index_from_progress()
+
+	_snap_train_to_progress()
+
+func _set_next_stop_index_from_current(current_stop_index: int) -> void:
+	if stop_offset.is_empty():
+		next_stop_index = 0
+		return
+
+	if train_speed >= 0.0:
+		next_stop_index = (current_stop_index + 1) % stop_offset.size()
+	else:
+		next_stop_index = current_stop_index - 1
+		if next_stop_index < 0:
+			next_stop_index = stop_offset.size() - 1
+
+func _update_next_stop_index_from_progress() -> void:
+	if stop_offset.is_empty():
+		next_stop_index = 0
+		return
+
+	if train_speed >= 0.0:
+		next_stop_index = 0
+		for i in range(stop_offset.size()):
+			if stop_offset[i] > train_progress + 0.001:
+				next_stop_index = i
+				return
+		return
+
+	next_stop_index = stop_offset.size() - 1
+	for i in range(stop_offset.size() - 1, -1, -1):
+		if stop_offset[i] < train_progress - 0.001:
+			next_stop_index = i
+			return
+
+func _snap_train_to_progress() -> void:
+	if train_instance == null or curve == null:
+		return
+
+	var total_length: float = curve.get_baked_length()
+	if total_length <= 0.0:
+		return
+
+	train_progress = wrapf(train_progress, 0.0, total_length)
+	var center_position: Vector3 = to_global(curve.sample_baked(train_progress, true))
+	var prog_forward: float = wrapf(train_progress + 2.0, 0.0, total_length)
+	var forward_position: Vector3 = to_global(curve.sample_baked(prog_forward, true))
+
+	train_instance.global_position = center_position
+	if center_position.distance_to(forward_position) > 0.01:
+		train_instance.look_at(forward_position, Vector3.UP)
+		train_instance.rotate_y(PI)
+
+	if cameras:
+		cameras.global_position = center_position
+		cameras.global_basis = train_instance.global_basis
+
+	_snap_wagons_to_progress(total_length)
+
 func build_rails() -> void:
 	var mat_wood = StandardMaterial3D.new()
 	mat_wood.albedo_color = Color(0.35, 0.2, 0.1) 
@@ -227,6 +360,8 @@ func train_move(delta: float) -> void:
 			cameras.global_position = center_position
 			cameras.global_basis = train_instance.global_basis
 
+		_snap_wagons_to_progress(total_length)
+				
 		var real_speed = abs(train_speed * stop_multiply)
 		var speed_factor = clamp(real_speed / max(speed_max, 0.001), 0.0, 1.0)
 		var dir_prev = (center_position - back_position).normalized()
@@ -304,6 +439,34 @@ func build_train() -> void:
 	else:
 		build_default_train()
 
+	var wagons = wagon_count
+	if wagon_random_number:
+		wagons = randi_range(1, wagon_count)
+	build_train_wagons(wagons)
+
+func build_train_wagons(wagon_number: int) -> void:
+	_clear_train_wagons()
+	if wagon_number <= 0 or wagon_pool == null or not "available_wagons" in wagon_pool:
+		return
+	if wagon_pool.available_wagons.is_empty():
+		return
+
+	for i in range(wagon_number):
+		var wagon_scene: PackedScene = wagon_pool.available_wagons.pick_random()
+		if wagon_scene == null:
+			continue
+
+		var wagon: Node3D = wagon_scene.instantiate() as Node3D
+		if wagon == null:
+			push_warning("Wagon scene root must be a Node3D.")
+			continue
+
+		add_child(wagon)
+		wagon_instances.append(wagon)
+
+	_update_wagon_progress_offsets()
+	_snap_wagons_to_progress()
+
 func build_default_train() -> void:
 	train_instance = Node3D.new()
 	add_child(train_instance)
@@ -338,3 +501,118 @@ func build_default_train() -> void:
 	stack.material_override = mat_body
 	stack.position = Vector3(0, 1.2, 1.0)
 	train_instance.add_child(stack)
+
+func _clear_train_wagons() -> void:
+	for wagon in wagon_instances:
+		if is_instance_valid(wagon):
+			wagon.queue_free()
+	wagon_instances.clear()
+	wagon_progress_offsets.clear()
+
+func _update_wagon_progress_offsets() -> void:
+	wagon_progress_offsets.clear()
+	if train_instance == null or wagon_instances.is_empty():
+		return
+
+	var train_length: float = _get_vehicle_length(train_instance)
+	var previous_length: float = train_length
+	var accumulated_distance: float = 0.0
+
+	for wagon in wagon_instances:
+		var wagon_length: float = _get_vehicle_length(wagon)
+		accumulated_distance += _get_wagon_spacing(previous_length, wagon_length)
+		wagon_progress_offsets.append(accumulated_distance)
+		previous_length = wagon_length
+
+func _get_wagon_spacing(previous_length: float, wagon_length: float) -> float:
+	if wagon_spacing_override > 0.0:
+		return wagon_spacing_override + wagon_gap
+
+	var detected_spacing: float = previous_length * 0.5 + wagon_length * 0.5
+	return detected_spacing * wagon_spacing_scale + wagon_gap
+
+func _snap_wagons_to_progress(total_length: float = 0.0) -> void:
+	if curve == null or wagon_instances.is_empty():
+		return
+
+	if total_length <= 0.0:
+		total_length = curve.get_baked_length()
+	if total_length <= 0.0:
+		return
+
+	var direction: float = 1.0
+	if train_speed < 0.0:
+		direction = -1.0
+
+	for i in range(wagon_instances.size()):
+		var wagon: Node3D = wagon_instances[i]
+		if not is_instance_valid(wagon):
+			continue
+
+		var wagon_offset: float = float(i + 1) * 7.0
+		if i < wagon_progress_offsets.size():
+			wagon_offset = wagon_progress_offsets[i]
+
+		var wagon_progress: float = train_progress - direction * wagon_offset
+		_snap_vehicle_to_progress(wagon, wagon_progress, total_length)
+
+func _snap_vehicle_to_progress(vehicle: Node3D, progress: float, total_length: float) -> void:
+	var vehicle_progress: float = wrapf(progress, 0.0, total_length)
+	var center_position: Vector3 = to_global(curve.sample_baked(vehicle_progress, true))
+	var prog_forward: float = wrapf(vehicle_progress + 2.0, 0.0, total_length)
+	var forward_position: Vector3 = to_global(curve.sample_baked(prog_forward, true))
+
+	vehicle.global_position = center_position
+	if center_position.distance_to(forward_position) > 0.01:
+		vehicle.look_at(forward_position, Vector3.UP)
+		vehicle.rotate_y(PI)
+
+func _get_vehicle_length(vehicle: Node3D) -> float:
+	var bounds: AABB = _get_node_local_bounds(vehicle, vehicle)
+	if bounds.size == Vector3.ZERO:
+		return 7.0
+
+	return maxf(bounds.size.z, 0.1)
+
+func _get_node_local_bounds(root: Node3D, node: Node) -> AABB:
+	var result: AABB = AABB()
+	var has_bounds: bool = false
+
+	var mesh_instance := node as MeshInstance3D
+	if mesh_instance != null and mesh_instance.mesh != null:
+		var mesh_bounds: AABB = mesh_instance.get_aabb()
+		var mesh_transform: Transform3D = root.global_transform.affine_inverse() * mesh_instance.global_transform
+		for corner in _get_aabb_corners(mesh_bounds):
+			var local_point: Vector3 = mesh_transform * corner
+			if has_bounds:
+				result = result.expand(local_point)
+			else:
+				result = AABB(local_point, Vector3.ZERO)
+				has_bounds = true
+
+	for child in node.get_children():
+		var child_bounds: AABB = _get_node_local_bounds(root, child)
+		if child_bounds.size == Vector3.ZERO:
+			continue
+
+		if has_bounds:
+			result = result.merge(child_bounds)
+		else:
+			result = child_bounds
+			has_bounds = true
+
+	return result
+
+func _get_aabb_corners(bounds: AABB) -> Array[Vector3]:
+	var start: Vector3 = bounds.position
+	var end: Vector3 = bounds.end
+	return [
+		Vector3(start.x, start.y, start.z),
+		Vector3(end.x, start.y, start.z),
+		Vector3(start.x, end.y, start.z),
+		Vector3(end.x, end.y, start.z),
+		Vector3(start.x, start.y, end.z),
+		Vector3(end.x, start.y, end.z),
+		Vector3(start.x, end.y, end.z),
+		Vector3(end.x, end.y, end.z),
+	]

core/biome_generator/railway_pool.gd

@@ -0,0 +1,5 @@
+extends Resource
+class_name RailwayPool
+
+@export var name: String = "New Railway Pool"
+@export var available_railways: Array[PackedScene] = []

core/biome_generator/railway_pool.gd.uid

@@ -0,0 +1 @@
+uid://c374rv220mvh1

core/biome_generator/railway_pool.tres

@@ -0,0 +1,16 @@
+[gd_resource type="Resource" script_class="RailwayPool" format=3 uid="uid://nrm040srfjwo"]
+
+[ext_resource type="PackedScene" uid="uid://cl2ast2tk7ifw" path="res://tgcc/chunk/railway/scene/chunk_railway_curve.tscn" id="1_86h1y"]
+[ext_resource type="PackedScene" uid="uid://85l80b6jcdhr" path="res://tgcc/chunk/railway/scene/chunk_railway_curve_2.tscn" id="2_r0882"]
+[ext_resource type="PackedScene" uid="uid://cewdxvcpqb53f" path="res://tgcc/chunk/railway/scene/chunk_railway_station_doubleside.tscn" id="3_3auto"]
+[ext_resource type="PackedScene" uid="uid://d3pcshw2bioic" path="res://tgcc/chunk/railway/scene/chunk_railway_station_oneside.tscn" id="4_i1umq"]
+[ext_resource type="PackedScene" uid="uid://bqxpqhla2kogq" path="res://tgcc/chunk/railway/scene/chunk_railway_straight.tscn" id="5_x44at"]
+[ext_resource type="PackedScene" uid="uid://c3ub6rj0tlt6q" path="res://tgcc/chunk/railway/scene/chunk_railway_straight_2.tscn" id="6_vrrkw"]
+[ext_resource type="PackedScene" uid="uid://cqevecsd1cm1v" path="res://tgcc/chunk/railway/scene/chunk_railway_straight_3.tscn" id="7_l17bw"]
+[ext_resource type="PackedScene" uid="uid://f53hfrjaxkwa" path="res://tgcc/chunk/railway/scene/chunk_railway_straight_bridge.tscn" id="8_qcl5o"]
+[ext_resource type="Script" uid="uid://c374rv220mvh1" path="res://core/biome_generator/railway_pool.gd" id="9_8tdc7"]
+
+[resource]
+script = ExtResource("9_8tdc7")
+name = "Railway Pool"
+available_railways = Array[PackedScene]([ExtResource("1_86h1y"), ExtResource("2_r0882"), ExtResource("3_3auto"), ExtResource("4_i1umq"), ExtResource("5_x44at"), ExtResource("6_vrrkw"), ExtResource("7_l17bw"), ExtResource("8_qcl5o")])

core/biome_generator/wagon_pool.gd

@@ -0,0 +1,6 @@
+## Resource that lists the wagon scenes available for train composition.
+class_name WagonPool
+extends Resource
+
+@export var name: String = "New Wagon Pool"
+@export var available_wagons: Array[PackedScene] = []

core/biome_generator/wagon_pool.tres

@@ -0,0 +1,9 @@
+[gd_resource type="Resource" script_class="WagonPool" format=3 uid="uid://bjnytgwt8tmf4"]
+
+[ext_resource type="PackedScene" uid="uid://dvk3bytqn3m5s" path="res://tgcc/train/main_train.tscn" id="1_t6q5r"]
+[ext_resource type="Script" uid="uid://b6xk0gtn2pwa" path="res://core/biome_generator/wagon_pool.gd" id="2_x6bmc"]
+
+[resource]
+script = ExtResource("2_x6bmc")
+name = "Wagon Pool"
+available_wagons = Array[PackedScene]([ExtResource("1_t6q5r")])

core/daynight/FogNoise.tres

@@ -0,0 +1,7 @@
+[gd_resource type="NoiseTexture2D" format=3 uid="uid://b2xcpt2y8v32x"]
+
+[sub_resource type="FastNoiseLite" id="FastNoiseLite_oqwsk"]
+
+[resource]
+noise = SubResource("FastNoiseLite_oqwsk")
+seamless = true

core/daynight/blur.gdshader

@@ -1,9 +1,17 @@
 shader_type canvas_item;
 
+// Cattura tutto quello che c'è sotto questo nodo
 uniform sampler2D screen_texture : hint_screen_texture, filter_linear_mipmap;
 
 uniform float blur_amount : hint_range(0.0, 5.0) = 2.5; 
+uniform float focus_size : hint_range(0.0, 1.0) = 0.4;  
+uniform float transition_softness : hint_range(0.01, 1.0) = 0.3; 
 
 void fragment() {
-    COLOR = textureLod(screen_texture, SCREEN_UV, blur_amount);
+    float dist_from_center = abs(SCREEN_UV.y - 0.5);
+    float mask = smoothstep(focus_size / 2.0, (focus_size / 2.0) + transition_softness, dist_from_center);
+    
+    // Applica il blur
+    vec4 blurred_screen = textureLod(screen_texture, SCREEN_UV, blur_amount * mask);
+    COLOR = blurred_screen;
 }

core/daynight/environment_management.tscn

@@ -9,6 +9,7 @@
 [ext_resource type="Material" uid="uid://codq5gx71rj4o" path="res://core/daynight/environment_dust_material.tres" id="8_amaf0"]
 [ext_resource type="Shader" uid="uid://bkn6eqgbn37jx" path="res://core/daynight/blur.gdshader" id="9_amaf0"]
 [ext_resource type="Shader" uid="uid://b5wa82soyhsqm" path="res://core/daynight/environment_shadows.gdshader" id="10_tuauy"]
+[ext_resource type="Texture2D" uid="uid://b2xcpt2y8v32x" path="res://core/daynight/FogNoise.tres" id="11_tuauy"]
 [ext_resource type="FastNoiseLite" uid="uid://c0mtwrkptjcuw" path="res://core/daynight/environment_shadows_noise_clouds.tres" id="11_yn8v8"]
 
 [sub_resource type="ShaderMaterial" id="ShaderMaterial_ruhh7"]
@@ -31,6 +32,7 @@ render_priority = 0
 shader = ExtResource("2_r4tfj")
 shader_parameter/use_red_as_alpha = true
 shader_parameter/fog_color = Color(0.8, 0.85, 0.9, 0.5)
+shader_parameter/fog_density = 0.25
 shader_parameter/scroll_speed = Vector2(0.05, 0.01)
 shader_parameter/texture_scale = Vector2(1, 1)
 shader_parameter/edge_softness_y = 0.2
@@ -40,9 +42,58 @@ shader_parameter/sun_color = Color(0.2841828, 0.2023238, 0.27953526, 1)
 
 [sub_resource type="Resource" id="Resource_r4tfj"]
 script = ExtResource("2_h6hjk")
+morning_color = Color(0.93333334, 0.78039217, 0.6039216, 1)
+afternoon_color = Color(0.9490196, 0.62352943, 0.38039216, 1)
+night_color = Color(0.18431373, 0.18431373, 0.4862745, 1)
+sun_rotation_morning = Vector3(-50, -90, 0)
+sun_rotation_afternoon = Vector3(-120, -90, 0)
+sun_rotation_night = Vector3(-130, -90, 0)
+night_light_energy = 1.0
+exposure_morning = 0.8
+exposure_afternoon = 0.7
+exposure_night = 0.7
+sky_top_morning = Color(0.11764706, 0.35686275, 0.5411765, 1)
+sky_top_afternoon = Color(0.7019608, 0.4509804, 0.2, 1)
+sky_top_night = Color(0.050980393, 0.050980393, 0.14901961, 1)
+sky_horizon_morning = Color(0.4627451, 0.6745098, 0.8627451, 1)
+sky_horizon_afternoon = Color(0.93333334, 0.6, 0.8039216, 1)
+sky_horizon_night = Color(0.14901961, 0.101960786, 0.2509804, 1)
+grad_top_morning = Color(0.7921569, 0.8784314, 0.95686275, 1)
+grad_top_afternoon = Color(0.8627451, 0.24313726, 0.5411765, 1)
+grad_top_night = Color(0.16470589, 0.16470589, 0.26666668, 1)
+grad_bot_morning = Color(0.05882353, 0.078431375, 0.21568628, 1)
+grad_bot_afternoon = Color(0.2509804, 0.019607844, 0.043137256, 1)
+grad_intensity_morning = 0.05
+grad_intensity_afternoon = 0.1
+grad_intensity_night = 0.5
+fog_color_morning = Color(0.7490196, 0.8509804, 0.9490196, 1)
+fog_color_afternoon = Color(0.9823975, 0.8034449, 0.8778439, 1)
+fog_color_night = Color(0.38409987, 0.28720453, 0.5907528, 1)
+fog_density_morning = 0.01
+fog_density_afternoon = 0.02
+glow_morning = 0.4
+glow_night = 0.8
 material_fog = SubResource("ShaderMaterial_b5atu")
 material_drops = SubResource("StandardMaterial3D_r4tfj")
 material_clouds = SubResource("ShaderMaterial_ruhh7")
+lightning_color = Color(1, 0.9843137, 0.4627451, 1)
+lightning_min = 2
+lightning_max = 4
+lightning_scale_min = 2.0
+lightning_scale_max = 5.0
+godray_max_rain = 30
+godray_spawn_radius = 100.0
+godray_spawn_offset = Vector3(20, 80, 20)
+godray_rotation_degrees = Vector3(50, 30, 0)
+godray_scale = Vector3(2, 25, 50)
+snow_amount = 2000.0
+wind_amount = 50
+cloud_speed = 0.01
+fireflies_amount = 550
+fireflies_spawn_ray = 60.0
+water_color_morning = Color(0.33333334, 0.654902, 0.5294118, 1)
+water_color_afternoon = Color(0.5803922, 0.5137255, 0.2901961, 1)
+water_color_night = Color(0.48235294, 0.45490196, 0.69411767, 1)
 metadata/_custom_type_script = "uid://butda6k2tli3o"
 
 [sub_resource type="Gradient" id="Gradient_i3hjl"]
@@ -85,7 +136,7 @@ gradient = SubResource("Gradient_djqkg")
 lifetime_randomness = 0.5
 emission_shape_scale = Vector3(5, 5, 5)
 emission_shape = 3
-emission_box_extents = Vector3(25, 5, 25)
+emission_box_extents = Vector3(1, 1, 1)
 direction = Vector3(0, 1, 0)
 initial_velocity_min = 6.0
 initial_velocity_max = 6.0
@@ -99,10 +150,9 @@ point_count = 3
 [sub_resource type="ShaderMaterial" id="ShaderMaterial_cer0u"]
 render_priority = 0
 shader = ExtResource("5_djqkg")
-shader_parameter/wave_frequency = 1.0
-shader_parameter/base_amplitude = 0.5
-shader_parameter/secondary_ratio = 0.6
-shader_parameter/time_scale_base = 3.0
+shader_parameter/time_scale = 3.065
+shader_parameter/wave_amplitude = 0.3
+shader_parameter/wave_frequency = 0.25
 
 [sub_resource type="TubeTrailMesh" id="TubeTrailMesh_vo82p"]
 material = SubResource("ShaderMaterial_cer0u")
@@ -174,7 +224,9 @@ size = Vector2(0.05, 0.8)
 
 [sub_resource type="ShaderMaterial" id="ShaderMaterial_kavln"]
 shader = ExtResource("9_amaf0")
-shader_parameter/blur_amount = 0.6000000285
+shader_parameter/blur_amount = 0.50000002375
+shader_parameter/focus_size = 0.54400002584
+shader_parameter/transition_softness = 0.00999999977648
 
 [sub_resource type="QuadMesh" id="QuadMesh_sxgg7"]
 size = Vector2(2, 2)
@@ -184,12 +236,12 @@ noise = ExtResource("11_yn8v8")
 seamless = true
 
 [sub_resource type="ShaderMaterial" id="ShaderMaterial_oqt1s"]
-render_priority = 0
+render_priority = -1
 shader = ExtResource("10_tuauy")
 shader_parameter/noise_texture = SubResource("NoiseTexture2D_0fcg4")
 shader_parameter/cloud_scale = 0.0070000003325
 shader_parameter/cloud_speed = 0.0030000001425
-shader_parameter/direction = Vector2(0.5, 0.2)
+shader_parameter/direction = Vector2(0.1, 0.025)
 shader_parameter/sun_angle = Vector2(0.5, 0.5)
 shader_parameter/cloud_density = 0.400000019
 shader_parameter/center_sharpness = 0.138000006555
@@ -201,7 +253,24 @@ shader_parameter/fade_end = 800.000035625
 shader_parameter/height_fade_start = 10.0
 shader_parameter/height_fade_end = 50.0
 
-[node name="EnvironmentManager" type="Node3D" unique_id=1611939731 node_paths=PackedStringArray("particles_wind", "particles_snow", "particles_fireflies", "particles_rain", "environment_dust", "blur", "environment_shadows")]
+[sub_resource type="QuadMesh" id="QuadMesh_yn8v8"]
+size = Vector2(2, 2)
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_sxgg7"]
+render_priority = 2
+shader = ExtResource("2_r4tfj")
+shader_parameter/fog_noise = ExtResource("11_tuauy")
+shader_parameter/use_red_as_alpha = true
+shader_parameter/fog_color = Color(0.8, 0.8509804, 0.9019608, 0.2509804)
+shader_parameter/fog_density = 0.25
+shader_parameter/scroll_speed = Vector2(0, 0.01)
+shader_parameter/texture_scale = Vector2(1, 1)
+shader_parameter/edge_softness_y = 0.16400000779
+shader_parameter/edge_softness_x = 0.5
+shader_parameter/night_intensity = 0.0
+shader_parameter/sun_color = Color(1, 1, 1, 1)
+
+[node name="EnvironmentManager" type="Node3D" unique_id=1611939731 node_paths=PackedStringArray("particles_wind", "particles_snow", "particles_fireflies", "particles_rain", "environment_dust", "blur", "environment_shadows", "fog")]
 script = ExtResource("1_wecen")
 environment_config = SubResource("Resource_r4tfj")
 particles_wind = NodePath("Particles_Wind")
@@ -212,6 +281,7 @@ godray = ExtResource("5_411rw")
 environment_dust = NodePath("EnvironmentDust")
 blur = NodePath("Blur")
 environment_shadows = NodePath("EnvironmentCloudsShadows")
+fog = NodePath("Fog")
 
 [node name="Particles_Fireflies" type="GPUParticles3D" parent="." unique_id=947538133]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 2, 0)
@@ -222,9 +292,10 @@ process_material = SubResource("ParticleProcessMaterial_i3hjl")
 draw_pass_1 = SubResource("QuadMesh_b5atu")
 
 [node name="Particles_Wind" type="GPUParticles3D" parent="." unique_id=1238214694]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 50, 0)
+transform = Transform3D(1, 0, 0, 0, -4.371139e-08, -1, 0, 1, -4.371139e-08, 0, 50, 0)
+cast_shadow = 0
 emitting = false
-amount = 100
+amount = 25
 lifetime = 3.0
 fixed_fps = 60
 process_material = SubResource("ParticleProcessMaterial_ruhh7")
@@ -271,3 +342,15 @@ mouse_filter = 2
 extra_cull_margin = 16384.0
 mesh = SubResource("QuadMesh_sxgg7")
 surface_material_override/0 = SubResource("ShaderMaterial_oqt1s")
+
+[node name="Fog" type="Node3D" parent="." unique_id=1626352238]
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="Fog" unique_id=96635311]
+transform = Transform3D(-42.075005, 7.553328e-06, 1.7196172e-13, 0, -3.7766642e-06, 45, 3.6783138e-06, 86.4, 1.9670128e-06, -41.926987, 14, 0)
+mesh = SubResource("QuadMesh_yn8v8")
+surface_material_override/0 = SubResource("ShaderMaterial_sxgg7")
+
+[node name="MeshInstance3D2" type="MeshInstance3D" parent="Fog" unique_id=10121049]
+transform = Transform3D(-42.075005, 7.553328e-06, 1.7196172e-13, 0, -3.7766642e-06, 45, 3.6783138e-06, 86.4, 1.9670128e-06, 59.320038, 14, 0)
+mesh = SubResource("QuadMesh_yn8v8")
+surface_material_override/0 = SubResource("ShaderMaterial_sxgg7")

core/daynight/environment_manager.gd

@@ -1,6 +1,10 @@
 class_name EnvironmentManagerRoot
 extends Node3D
 
+const NOISE_TEXTURE: Texture2D = preload("res://core/daynight/noise.tres")
+const WEATHER_SHADER: Material = preload("res://core/daynight/weather_overlay.tres")
+const DYNAMIC_ENVIRONMENT_UPDATES_PER_FRAME: int = 2 #how many update of the environment (apply materials) will be done per frame
+
 @export var environment_config: EnvironmentConfig
 
 @export_group("Camera")
@@ -16,6 +20,7 @@ extends Node3D
 @export var environment_dust: ColorRect
 @export var blur: ColorRect
 @export var environment_shadows: MeshInstance3D
+@export var fog: Node3D
 
 @export_group("Sound")
 @export var thunder_sounds: Array[AudioStream]
@@ -30,9 +35,13 @@ var weather_controller: WeatherController
 
 var day_tween: Tween
 var day_time: float = 0.0
+var pending_environment_nodes: Dictionary = {}
 
 func _ready() -> void:
 	
+	#connect shader when new node is added
+	get_tree().node_added.connect(_on_tree_node_added)
+	
 	#set noise texture 2d to materials in special group
 	ApplyWindNoiseToMaterials()
 	#set weather overlay (snow + rain) to materials in special group
@@ -55,6 +64,7 @@ func _ready() -> void:
 			godray,
 			environment_dust,
 			blur,
+			fog,
 			environment_shadows,
 			sun,
 			environment,
@@ -67,10 +77,67 @@ func _ready() -> void:
 		weather_controller.name = "WeatherController"
 		add_child(weather_controller)
 
+func _process(_delta: float) -> void:
+	_process_pending_environment_nodes()
+
+func _on_tree_node_added(node: Node) -> void:
+	if node.is_in_group("wind_node") or node.is_in_group("weather_node") or node.is_in_group("weather_vegetables_node"):
+		_queue_dynamic_environment_node(node)
+
+func _queue_dynamic_environment_node(node: Node) -> void:
+	if not is_instance_valid(node):
+		return
+
+	var ancestor = node.get_parent()
+	while ancestor != null:
+		if pending_environment_nodes.has(ancestor.get_instance_id()):
+			return
+		ancestor = ancestor.get_parent()
+
+	var stale_ids: Array[int] = []
+	for node_id in pending_environment_nodes.keys():
+		var pending_node = pending_environment_nodes[node_id]
+		if not is_instance_valid(pending_node):
+			stale_ids.append(node_id)
+			continue
+		if node.is_ancestor_of(pending_node):
+			stale_ids.append(node_id)
+
+	for node_id in stale_ids:
+		pending_environment_nodes.erase(node_id)
+
+	pending_environment_nodes[node.get_instance_id()] = node
+
+func _process_pending_environment_nodes() -> void:
+	var processed = 0
+	for node_id in pending_environment_nodes.keys():
+		if processed >= DYNAMIC_ENVIRONMENT_UPDATES_PER_FRAME:
+			break
+
+		var node = pending_environment_nodes[node_id]
+		pending_environment_nodes.erase(node_id)
+		if not is_instance_valid(node):
+			continue
+
+		_apply_dynamic_environment_materials(node)
+		processed += 1
+
+func _apply_dynamic_environment_materials(node: Node) -> void:
+	if not is_instance_valid(node):
+		return
+
+	if node.is_in_group("wind_node"):
+		_apply_wind_noise_to_node(node, NOISE_TEXTURE)
+
+	if node.is_in_group("weather_node"):
+		_apply_weather_overlay_to_node(node, WEATHER_SHADER)
+
+	if node.is_in_group("weather_vegetables_node"):
+		_clear_weather_overlay_from_node(node)
+
 func ApplyWindNoiseToMaterials():
-	var noise_tex = preload("res://core/daynight/noise.tres")
 	for node in get_tree().get_nodes_in_group("wind_node"):
-		_apply_wind_noise_to_node(node, noise_tex)
+		_apply_wind_noise_to_node(node, NOISE_TEXTURE)
 
 func _apply_wind_noise_to_node(node: Node, noise_tex: Texture2D) -> void:
 	if node is GeometryInstance3D:
@@ -88,25 +155,57 @@ func _apply_wind_noise_to_node(node: Node, noise_tex: Texture2D) -> void:
 		_apply_wind_noise_to_node(child, noise_tex)
 
 func ApplyWeatherShaderToMaterials():
-	var weather_shader = preload("res://core/daynight/weather_overlay.tres")
 	for node in get_tree().get_nodes_in_group("weather_node"):
-		if node is GeometryInstance3D:
-			node.material_overlay = weather_shader
-		else:
-			for child in node.get_children():
-				if child is GeometryInstance3D:
-					child.material_overlay = weather_shader
-					break
+		_apply_weather_overlay_to_node(node, WEATHER_SHADER)
 
-	var weather_plain_shader = preload("res://core/daynight/weather_plain_shader.tres")
 	for node in get_tree().get_nodes_in_group("weather_vegetables_node"):
+		_clear_weather_overlay_from_node(node)
+
+func _apply_weather_overlay_to_node(node: Node, material: Material) -> void:
+	if node.is_in_group("weather_vegetables_node"):
+		_clear_weather_overlay_from_node(node)
+		return
+
 	if node is GeometryInstance3D:
-			node.material_overlay = weather_plain_shader
+		if _geometry_uses_alpha_texture(node):
+			node.material_overlay = null
 		else:
+			node.material_overlay = material
+
 	for child in node.get_children():
-				if child is GeometryInstance3D:
-					child.material_overlay = weather_plain_shader
-					break
+		_apply_weather_overlay_to_node(child, material)
+
+func _clear_weather_overlay_from_node(node: Node) -> void:
+	if node is GeometryInstance3D:
+		node.material_overlay = null
+
+	for child in node.get_children():
+		_clear_weather_overlay_from_node(child)
+
+func _geometry_uses_alpha_texture(node: GeometryInstance3D) -> bool:
+	var material_override := node.material_override as ShaderMaterial
+	if _shader_material_uses_alpha_texture(material_override):
+		return true
+
+	if node is MeshInstance3D:
+		for surface_index in node.get_surface_override_material_count():
+			var surface_material := node.get_surface_override_material(surface_index) as ShaderMaterial
+			if _shader_material_uses_alpha_texture(surface_material):
+				return true
+
+		if node.mesh:
+			for surface_index in node.mesh.get_surface_count():
+				var mesh_material := node.mesh.surface_get_material(surface_index) as ShaderMaterial
+				if _shader_material_uses_alpha_texture(mesh_material):
+					return true
+
+	return false
+
+func _shader_material_uses_alpha_texture(material: ShaderMaterial) -> bool:
+	if material == null or material.shader == null:
+		return false
+
+	return material.shader.code.find("alpha_texture") != -1
 
 func select_day_time(normalized_time: float) -> void:
 	#set show_day_time_debug = true to show debug on screen

core/daynight/environment_shadows.gdshader

@@ -67,7 +67,6 @@ void fragment() {
 				float is_center = step(center_sharpness, internal_n);
 
 				ALBEDO = shadow_color;
-				
 				ALPHA = mix(opacity_edge, opacity_center, is_center) * final_fade;
 			}
 		}

core/daynight/fog.gdshader

@@ -7,6 +7,7 @@ uniform bool use_red_as_alpha = true;
 
 group_uniforms Settings;
 uniform vec4 fog_color : source_color = vec4(0.8, 0.85, 0.9, 0.5);
+uniform float fog_density : hint_range(0.0, 1.0) = 0.25;
 uniform vec2 scroll_speed = vec2(0.05, 0.01);
 uniform vec2 texture_scale = vec2(1.0, 1.0);
 
@@ -36,5 +37,5 @@ void fragment() {
 	vec3 dark_fog = tinted_fog * 0.5;
 	ALBEDO = mix(tinted_fog, dark_fog, night_intensity);
 	
-	ALPHA = fog_color.a * noise_alpha * edge_mask;
+	ALPHA = fog_color.a * fog_density * noise_alpha * edge_mask;
 }

core/daynight/grass_leaves.gdshader

@@ -8,10 +8,12 @@ global uniform float global_wind_speed;
 global uniform float global_wind_strength;
 global uniform vec2 global_wind_direction;
 //global uniform sampler2D global_wind_noise : filter_linear_mipmap;
-global uniform float global_snow_start_time;
-global uniform float global_snow_accumulation_speed;
-global uniform float global_snow_melt_time;
-global uniform float global_snow_melt_speed;
+global uniform float global_snow_start_time = -1.0;
+global uniform float global_snow_accumulation_speed = 0.005;
+global uniform float global_snow_melt_time = -1.0;
+global uniform float global_snow_melt_speed = 0.1;
+global uniform float global_snow_amount = 0.0;
+global uniform float global_rain_intensity;
 
 // --- PARAMETRI ESTETICI ---
 uniform bool billboard_enabled = true; 
@@ -31,6 +33,7 @@ uniform vec4 variance_color : source_color = vec4(0.3, 0.5, 0.2, 1.0); // Colore
 uniform float variance_intensity : hint_range(0.0, 1.0) = 0.4; // Quanto si vedono le chiazze
 
 uniform vec4 snow_color : source_color = vec4(0.85, 0.9, 0.95, 1.0);
+uniform float snow_visibility : hint_range(0.0, 1.0) = 1.0;
 
 // --- CONTROLLO GRADIENTE E RANDOM ---
 uniform float height_min = 0.0;
@@ -41,6 +44,7 @@ uniform float light_steps : hint_range(1.0, 10.0) = 4.0;
 uniform float random_mix : hint_range(0.0, 1.0) = 0.3;
 
 uniform float cast_shadow_strength : hint_range(0.0, 1.0) = 0.6;
+uniform float wetness_darkening : hint_range(0.0, 0.5) = 0.25;
 
 varying vec3 v_final_color;
 varying float v_shade_factor; 
@@ -52,6 +56,21 @@ float hash(vec3 p) {
 	return fract((p.x + p.y) * p.z);
 }
 
+float get_snow_progress() {
+	float snow_progress = clamp(global_snow_amount, 0.0, 1.0);
+
+	if (global_snow_start_time >= 0.0) {
+		float timed_progress = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
+		snow_progress = max(snow_progress, timed_progress);
+	}
+	if (global_snow_melt_time >= 0.0) {
+		float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
+		snow_progress = min(snow_progress, 1.0 - melt);
+	}
+
+	return snow_progress;
+}
+
 void vertex() {
 	vec3 instance_pos = MODEL_MATRIX[3].xyz;
 	v_world_pos = instance_pos; // Salviamo la posizione dell'istanza
@@ -113,17 +132,10 @@ void fragment() {
 	// Applichiamo la variazione al colore finale dell'erba
 	vec3 varied_grass_color = mix(v_final_color, variance_color.rgb, noise_sample * variance_intensity);
 
-	float snow_amount = 0.0;
-	if (global_snow_start_time >= 0.0) {
-		snow_amount = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
-	}
-	if (global_snow_melt_time >= 0.0) {
-		float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
-		snow_amount *= (1.0 - melt);
-	}
+	float snow_amount = smoothstep(0.0, 1.0, get_snow_progress());
 	
 	float top_mask = 1.0 - shifted_uv.y; 
-	float snow_mask = smoothstep(1.0 - snow_amount, 1.2 - snow_amount, top_mask);
+	float snow_mask = smoothstep(0.65, 1.0, top_mask) * snow_amount * snow_visibility;
 	snow_mask *= step(0.01, snow_amount);
 	
 	vec3 dark_snow = snow_color.rgb * (1.0 - shadow_intensity);
@@ -131,12 +143,15 @@ void fragment() {
 	
 	// Mescoliamo il colore variato con la neve
 	vec3 final_albedo = mix(varied_grass_color, shaded_snow, snow_mask);
+	float rain_int = clamp(global_rain_intensity, 0.0, 1.0);
+	final_albedo *= mix(1.0, 1.0 - wetness_darkening, rain_int);
+	float final_roughness = mix(0.02, 0.005, rain_int);
 
 	ALBEDO = final_albedo;
 	ALPHA = tex.r * opacity; 
 	ALPHA_SCISSOR_THRESHOLD = 0.5;
 	
-	ROUGHNESS = 0.02; 
+	ROUGHNESS = final_roughness; 
 }
 
 void light() {

core/daynight/snow_cap.gd

@@ -0,0 +1,107 @@
+## Procedural snow cap geometry for flat roofs and vehicles.
+extends Node3D
+
+enum PlacementMode {
+	AUTO_TARGET_AABB,
+	MANUAL_SURFACE,
+}
+
+const SNOW_CAP_SHADER: Shader = preload("res://core/daynight/snow_cap.gdshader")
+
+@export var placement_mode: PlacementMode = PlacementMode.AUTO_TARGET_AABB
+@export var target_path: NodePath
+@export var size_inset: Vector2 = Vector2(0.25, 1.0)
+@export var position_offset: Vector3 = Vector3(0.0, -0.08, 0.0)
+@export var max_snow_height: float = 0.2
+@export_range(1, 24) var subdivide_width: int = 6
+@export_range(1, 24) var subdivide_depth: int = 18
+@export var manual_surface_center: Vector3 = Vector3.ZERO
+@export var manual_surface_size: Vector2 = Vector2(2.0, 6.0)
+
+var _mesh_instance: MeshInstance3D
+
+func _ready() -> void:
+	add_to_group("weather_overlay_ignore")
+	_ensure_mesh_instance()
+	_rebuild()
+
+func rebuild() -> void:
+	_rebuild()
+
+func _ensure_mesh_instance() -> void:
+	_mesh_instance = get_node_or_null("SnowCapMesh") as MeshInstance3D
+	if _mesh_instance != null:
+		return
+
+	_mesh_instance = MeshInstance3D.new()
+	_mesh_instance.name = "SnowCapMesh"
+	_mesh_instance.add_to_group("weather_overlay_ignore")
+	add_child(_mesh_instance)
+
+func _rebuild() -> void:
+	var cap_width: float = 0.0
+	var cap_depth: float = 0.0
+	var cap_surface_center := Vector3.ZERO
+
+	if placement_mode == PlacementMode.MANUAL_SURFACE:
+		cap_width = manual_surface_size.x
+		cap_depth = manual_surface_size.y
+		cap_surface_center = manual_surface_center
+	else:
+		var target_mesh: MeshInstance3D = get_node_or_null(target_path) as MeshInstance3D
+		if target_mesh == null:
+			if _mesh_instance:
+				_mesh_instance.visible = false
+			return
+
+		var target_aabb: AABB = _get_target_aabb(target_mesh)
+		cap_width = max(target_aabb.size.x - size_inset.x, 0.1)
+		cap_depth = max(target_aabb.size.z - size_inset.y, 0.1)
+		cap_surface_center = Vector3(
+			target_aabb.position.x + target_aabb.size.x * 0.5,
+			target_aabb.position.y + target_aabb.size.y,
+			target_aabb.position.z + target_aabb.size.z * 0.5
+		)
+
+	var cap_center := cap_surface_center + Vector3(0.0, max_snow_height * 0.5, 0.0)
+
+	var box_mesh := BoxMesh.new()
+	box_mesh.size = Vector3(cap_width, max_snow_height, cap_depth)
+	box_mesh.subdivide_width = subdivide_width
+	box_mesh.subdivide_depth = subdivide_depth
+	_mesh_instance.mesh = box_mesh
+	_mesh_instance.position = cap_center + position_offset
+	_mesh_instance.material_override = _build_material(cap_width, cap_depth)
+	_mesh_instance.visible = true
+
+func _build_material(cap_width: float, cap_depth: float) -> ShaderMaterial:
+	var material := ShaderMaterial.new()
+	material.shader = SNOW_CAP_SHADER
+	material.set_shader_parameter("max_height", max_snow_height)
+	material.set_shader_parameter("half_width", cap_width * 0.5)
+	material.set_shader_parameter("half_depth", cap_depth * 0.5)
+	return material
+
+func _get_target_aabb(target_mesh: MeshInstance3D) -> AABB:
+	var points: Array[Vector3] = []
+	for point in _get_aabb_points(target_mesh.get_aabb()):
+		points.append(target_mesh.transform * point)
+
+	var merged := AABB(points[0], Vector3.ZERO)
+	for point in points:
+		merged = merged.expand(point)
+	return merged
+
+func _get_aabb_points(aabb: AABB) -> Array[Vector3]:
+	var p: Vector3 = aabb.position
+	var s: Vector3 = aabb.size
+	return [
+		p,
+		p + Vector3(s.x, 0.0, 0.0),
+		p + Vector3(0.0, s.y, 0.0),
+		p + Vector3(0.0, 0.0, s.z),
+		p + Vector3(s.x, s.y, 0.0),
+		p + Vector3(s.x, 0.0, s.z),
+		p + Vector3(0.0, s.y, s.z),
+		p + s,
+	]

core/daynight/snow_cap.gd.uid

@@ -0,0 +1 @@
+uid://bxc6ketfgedxw

core/daynight/snow_cap.gdshader

@@ -0,0 +1,116 @@
+shader_type spatial;
+render_mode blend_mix, cull_back, depth_draw_opaque;
+
+global uniform float global_snow_start_time = -1.0;
+global uniform float global_snow_accumulation_speed = 0.005;
+global uniform float global_snow_melt_time = -1.0;
+global uniform float global_snow_melt_speed = 0.1;
+global uniform float global_snow_amount = 0.0;
+global uniform vec4 global_snow_color = vec4(0.92, 0.96, 1.0, 1.0);
+
+uniform float max_height : hint_range(0.02, 1.0) = 0.2;
+uniform float half_width : hint_range(0.01, 20.0) = 1.0;
+uniform float half_depth : hint_range(0.01, 20.0) = 1.0;
+uniform float noise_scale : hint_range(0.05, 2.0) = 0.35;
+uniform float noise_strength : hint_range(0.0, 0.4) = 0.18;
+uniform float edge_rounding : hint_range(0.0, 0.3) = 0.12;
+uniform float side_shade : hint_range(0.2, 1.0) = 0.82;
+uniform float sparkle_strength : hint_range(0.0, 0.1) = 0.03;
+
+varying float v_snow_amount;
+varying float v_noise;
+
+float hash(vec2 p) {
+	return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
+}
+
+float value_noise(vec2 p) {
+	vec2 i = floor(p);
+	vec2 f = fract(p);
+	vec2 u = f * f * (3.0 - 2.0 * f);
+
+	float a = hash(i);
+	float b = hash(i + vec2(1.0, 0.0));
+	float c = hash(i + vec2(0.0, 1.0));
+	float d = hash(i + vec2(1.0, 1.0));
+
+	return mix(mix(a, b, u.x), mix(c, d, u.x), u.y);
+}
+
+float fbm(vec2 p) {
+	float value = 0.0;
+	float amplitude = 0.5;
+	float frequency = 1.0;
+
+	for (int i = 0; i < 4; i++) {
+		value += value_noise(p * frequency) * amplitude;
+		frequency *= 2.0;
+		amplitude *= 0.5;
+	}
+
+	return clamp(value, 0.0, 1.0);
+}
+
+float get_snow_amount() {
+	float snow_amount = clamp(global_snow_amount, 0.0, 1.0);
+	if (global_snow_start_time >= 0.0) {
+		float timed_amount = clamp(
+			(TIME - global_snow_start_time) * global_snow_accumulation_speed,
+			0.0,
+			1.0
+		);
+		snow_amount = max(snow_amount, timed_amount);
+	}
+	if (global_snow_melt_time >= 0.0) {
+		float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
+		snow_amount = min(snow_amount, 1.0 - melt);
+	}
+	return snow_amount;
+}
+
+void vertex() {
+	vec3 base_vertex = VERTEX;
+	vec3 world_pos = (MODEL_MATRIX * vec4(base_vertex, 1.0)).xyz;
+	float snow_amount = get_snow_amount();
+	float noise_val = fbm(world_pos.xz * noise_scale);
+	float thickness = max_height * snow_amount * mix(
+		1.0 - noise_strength,
+		1.0 + noise_strength,
+		noise_val
+	);
+	float footprint_growth = smoothstep(0.0, 0.35, snow_amount);
+
+	float from_bottom = clamp((base_vertex.y + max_height * 0.5) / max_height, 0.0, 1.0);
+	VERTEX.y = -max_height * 0.5 + thickness * from_bottom;
+	VERTEX.x *= mix(0.92, 1.0, footprint_growth);
+	VERTEX.z *= mix(0.94, 1.0, footprint_growth);
+
+	float edge_x = abs(base_vertex.x) / max(half_width, 0.001);
+	float edge_z = abs(base_vertex.z) / max(half_depth, 0.001);
+	float edge_mask = smoothstep(0.55, 1.0, max(edge_x, edge_z));
+	float top_mask = smoothstep(0.6, 1.0, from_bottom) * snow_amount;
+	float round_factor = edge_rounding * edge_mask * top_mask;
+	VERTEX.x *= 1.0 - round_factor;
+	VERTEX.z *= 1.0 - round_factor;
+
+	v_snow_amount = snow_amount;
+	v_noise = noise_val;
+}
+
+void fragment() {
+	if (v_snow_amount <= 0.001) {
+		ALPHA = 0.0;
+		ALBEDO = global_snow_color.rgb;
+		ROUGHNESS = 1.0;
+		SPECULAR = 0.0;
+	} else {
+		float facing_up = clamp(NORMAL.y, 0.0, 1.0);
+		float shade = mix(-sparkle_strength, sparkle_strength, v_noise);
+		vec3 snow_albedo = clamp(global_snow_color.rgb + vec3(shade), 0.0, 1.0);
+
+		ALBEDO = mix(snow_albedo * side_shade, snow_albedo, facing_up);
+		ROUGHNESS = mix(0.95, 0.72, facing_up);
+		SPECULAR = 0.18;
+		ALPHA = smoothstep(0.0, 0.28, v_snow_amount);
+	}
+}

core/daynight/snow_cap.gdshader.uid

@@ -0,0 +1 @@
+uid://c7js7ytvewmab

core/daynight/tree_leaves.gdshader

@@ -6,12 +6,12 @@ global uniform vec2  global_wind_direction;
 global uniform float global_wind_scale;
 global uniform float global_wind_strength;
 global uniform float global_wind_fade;
-/*
-global uniform float global_snow_start_time;
-global uniform float global_snow_accumulation_speed;
-global uniform float global_snow_melt_time;
-global uniform float global_snow_melt_speed;
-global uniform vec4  global_snow_color;*/
+global uniform float global_snow_start_time = -1.0;
+global uniform float global_snow_accumulation_speed = 0.005;
+global uniform float global_snow_melt_time = -1.0;
+global uniform float global_snow_melt_speed = 0.1;
+global uniform float global_snow_amount = 0.0;
+global uniform vec4  global_snow_color;
 global uniform float global_rain_intensity;
 
 uniform sampler2D wind_noise : filter_linear_mipmap;
@@ -31,6 +31,7 @@ uniform float light_steps : hint_range(1.0, 10.0) = 4.0;
 uniform float random_mix : hint_range(0.0, 1.0) = 0.3;
 uniform float cast_shadow_strength : hint_range(0.0, 1.0) = 0.6;
 uniform float wetness_darkening : hint_range(0.0, 0.5) = 0.25;
+uniform float snow_visibility : hint_range(0.0, 1.0) = 1.0;
 
 varying vec3 v_final_color;
 varying float v_shade_factor;
@@ -41,6 +42,21 @@ float hash(vec3 p) {
     return fract((p.x + p.y) * p.z);
 }
 
+float get_snow_progress() {
+    float snow_progress = clamp(global_snow_amount, 0.0, 1.0);
+
+    if (global_snow_start_time >= 0.0) {
+        float timed_progress = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
+        snow_progress = max(snow_progress, timed_progress);
+    }
+    if (global_snow_melt_time >= 0.0) {
+        float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
+        snow_progress = min(snow_progress, 1.0 - melt);
+    }
+
+    return snow_progress;
+}
+
 void vertex() {
     vec3 instance_pos = MODEL_MATRIX[3].xyz;
 
@@ -88,24 +104,16 @@ void fragment() {
     vec2 shifted_uv = UV + texture_offset;
     vec4 tex = texture(alpha_texture, shifted_uv);
 
-    //// Snow accumulation
-    //float snow_amount = 0.0;
-    //if (global_snow_start_time >= 0.0) {
-        //snow_amount = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
-    //}
-    //if (global_snow_melt_time >= 0.0) {
-        //float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
-        //snow_amount *= (1.0 - melt);
-    //}
-//
-    //float top_mask = 1.0 - shifted_uv.y;
-    //float snow_mask = smoothstep(1.0 - snow_amount, 1.2 - snow_amount, top_mask);
-    //snow_mask *= step(0.01, snow_amount);
+    // Snow accumulation
+    float snow_amount = pow(get_snow_progress(), 0.55);
 
-    //vec3 dark_snow = global_snow_color.rgb * (1.0 - shadow_intensity);
-    //vec3 shaded_snow = mix(dark_snow, global_snow_color.rgb, v_shade_factor);
-    //vec3 final_albedo = mix(v_final_color, shaded_snow, snow_mask);
-	vec3 final_albedo = v_final_color;
+    float top_mask = 1.0 - shifted_uv.y;
+    float snow_mask = smoothstep(1.0 - snow_amount * 1.35, 1.08 - snow_amount * 1.35, top_mask) * snow_visibility;
+    snow_mask *= step(0.01, snow_amount);
+
+    vec3 dark_snow = global_snow_color.rgb * (1.0 - shadow_intensity);
+    vec3 shaded_snow = mix(dark_snow, global_snow_color.rgb, v_shade_factor);
+    vec3 final_albedo = mix(v_final_color, shaded_snow, snow_mask);
 	
     // Rain wetness: darken and make shinier
     float rain_int = clamp(global_rain_intensity, 0.0, 1.0);

core/daynight/water_ripple.gdshader

@@ -2,6 +2,13 @@ shader_type spatial;
 render_mode blend_mix, depth_draw_always; 
 
 global uniform float global_rain_intensity;
+global uniform vec4 global_water_color = vec4(0.285, 0.534, 0.487, 1.0);
+global uniform float global_snow_start_time = -1.0;
+global uniform float global_snow_accumulation_speed = 0.005;
+global uniform float global_snow_melt_time = -1.0;
+global uniform float global_snow_melt_speed = 0.1;
+global uniform float global_snow_amount = 0.0;
+global uniform vec4 global_snow_color = vec4(0.92, 0.96, 1.0, 1.0);
 
 //Water color
 uniform vec4 deep_water_color : source_color = vec4(0.0, 0.1, 0.2, 1.0);
@@ -28,6 +35,21 @@ uniform sampler2D depth_texture : hint_depth_texture, filter_linear_mipmap;
 varying vec2 world_pos_xz;
 varying vec2 local_uv;
 
+float get_snow_progress() {
+	float snow_progress = clamp(global_snow_amount, 0.0, 1.0);
+
+	if (global_snow_start_time >= 0.0) {
+		float timed_progress = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
+		snow_progress = max(snow_progress, timed_progress);
+	}
+	if (global_snow_melt_time >= 0.0) {
+		float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
+		snow_progress = min(snow_progress, 1.0 - melt);
+	}
+
+	return snow_progress;
+}
+
 void vertex() {
 	world_pos_xz = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xz;
 	local_uv = UV;
@@ -44,12 +66,14 @@ void fragment() {
 	float water_depth_gradient = exp(-depth_difference * beer_law_factor);
 	vec4 base_water = mix(deep_water_color, shallow_water_color, water_depth_gradient);
 	float rain_intensity = clamp(global_rain_intensity, 0.0, 1.0);
+	base_water.rgb = mix(base_water.rgb, global_water_color.rgb, 0.7);
 
 	vec2 pos = world_pos_xz * ripple_scale;
 	vec2 cell = floor(pos);
 	vec2 local_pos = fract(pos) - 0.5;
 	float random_val = fract(sin(dot(cell, vec2(12.9898, 78.233))) * 43758.5453);
-	float is_active_cell = step(1.0 - ripple_density, random_val);
+	float active_ripple_density = ripple_density * rain_intensity;
+	float is_active_cell = step(1.0 - active_ripple_density, random_val);
 	
 	float ring = 0.0;
 	if (is_active_cell > 0.0) {
@@ -79,8 +103,15 @@ void fragment() {
 	float is_sky = step(ref_depth_raw, 0.00001); // Protezione anti-cielo
 	reflection_mask *= (1.0 - is_sky);
 
-	vec3 final_rgb = mix(base_water.rgb, screen_ref, reflection_strength * reflection_mask);
+	float snow_progress = get_snow_progress();
+	float active_snowfall = step(0.0, global_snow_start_time) * (1.0 - step(0.0, global_snow_melt_time));
+	float reflection_snow_damping = max(smoothstep(0.0, 0.08, snow_progress), active_snowfall * 0.75);
+	float effective_reflection_strength = reflection_strength * (1.0 - reflection_snow_damping * 0.85);
+
+	vec3 final_rgb = mix(base_water.rgb, screen_ref, effective_reflection_strength * reflection_mask);
 	final_rgb = mix(final_rgb, ripple_color.rgb, ring * ripple_color.a);
+	float water_snow_amount = smoothstep(0.15, 1.0, snow_progress) * 0.18;
+	final_rgb = mix(final_rgb, global_snow_color.rgb, water_snow_amount);
 
 	ALBEDO = final_rgb;
 	

core/daynight/water_river.gdshader

@@ -0,0 +1,241 @@
+#define USE_CAUSTICS 1
+#define USE_REFRACTION 1
+#define USE_DISPLACEMENT 1
+#define USE_STYLIZED_LIGHTING 0
+#define USE_UNSHADED 0
+
+shader_type spatial;
+#if USE_UNSHADED
+	render_mode unshaded, depth_draw_never;
+#else
+	render_mode depth_draw_never;
+#endif
+
+uniform sampler2D DEPTH_TEXTURE: hint_depth_texture;
+
+group_uniforms Color;
+uniform vec4 surface_color : source_color = vec4(0.2,1.0,0.8,1.0);
+uniform vec4 depth_color : source_color = vec4(0.08,0.2,0.4,1.0);
+uniform vec4 foam_color : source_color = vec4(1.0);
+uniform float depth_size = 12.0;
+
+group_uniforms Roughness;
+uniform float surface_roughness : hint_range(0.0, 1.0, 0.01) = 0.05;
+uniform float foam_roughness : hint_range(0.0, 1.0, 0.01) = 0.05;
+
+#if USE_CAUSTICS
+	group_uniforms Caustics;
+	uniform sampler2D caustics_texture;
+	uniform float caustics_strength = 2.0;
+	uniform vec2 caustics_scale = vec2(0.5);
+#endif
+
+group_uniforms Wave;
+uniform sampler2D wave_texture;
+uniform float wave_softness : hint_range(0.0, 10.0, 0.1) = 3.0;
+uniform vec2 wave_scale = vec2(0.2);
+uniform vec2 wave_layer_scale = vec2(1.5);
+uniform float wave_highlight : hint_range(0.0, 1.0, 0.05) = 0.5;
+
+group_uniforms Wave.Motion;
+uniform vec2 wave_velocity = vec2(0.02);
+instance uniform vec2 river_flow_direction = vec2(0.0, 0.0);
+
+group_uniforms Foam;
+uniform sampler2D foam_texture;
+uniform float edge_foam_depth_size = 1.0;
+uniform float wave_foam_amount : hint_range(0.0, 1.0, 0.01) = 0.8;
+uniform float foam_start : hint_range(0.0, 1.0, 0.05) = 0.15;
+uniform float foam_end : hint_range(0.0, 1.0, 0.05) = 0.3;
+uniform float foam_exponent = 2.0;
+
+#if USE_REFRACTION
+	group_uniforms Refraction;
+	uniform float refraction_amount = 0.5;
+	uniform float refraction_exponent = 0.5;
+#endif
+
+#if USE_DISPLACEMENT
+	group_uniforms Displacement;
+	uniform float displacement_amount = 0.3;
+#endif
+
+#if USE_STYLIZED_LIGHTING && !USE_UNSHADED
+	group_uniforms Lighting;
+	uniform float diffuse_steps = 12.0;
+	uniform float diffuse_smoothness : hint_range(0.0, 1.0, 0.01) = 0.2;
+	uniform float specular_steps = 12.0;
+	uniform float specular_smoothness : hint_range(0.0, 1.0, 0.01) = 0.2;
+#endif
+
+uniform sampler2D screen_texture : hint_screen_texture;
+varying vec3 world_pos;
+varying vec2 world_wave_velocity;
+
+#if USE_CAUSTICS
+	vec3 sample_caustics(vec2 uv){
+		vec2 caustics_uv = uv * caustics_scale;
+		return vec3(
+			texture(caustics_texture, caustics_uv).r,
+			texture(caustics_texture, caustics_uv+vec2(0.02,0.02)).r,
+			texture(caustics_texture, caustics_uv+vec2(0.03,0.01)).r
+		);
+	}
+#endif
+
+vec4 sample_world_dpos(vec2 screen_uv, mat4 inv_proj_mat, mat4 inv_view_mat){
+	vec4 clip_pos = vec4(screen_uv * 2.0 - 1.0, texture(DEPTH_TEXTURE, screen_uv).r, 1.0);
+	vec4 view_pos = inv_proj_mat * clip_pos;
+	view_pos /= view_pos.w;
+	vec4 world_dpos = inv_view_mat * view_pos;
+	return world_dpos;
+}
+
+vec4 sample_wave(sampler2D tex, vec2 uv, vec2 velocity, float lod){
+	vec2 base_uv = uv * wave_scale;
+	vec2 wave_uv1 = (base_uv * wave_layer_scale) + (TIME * -velocity);
+	float wave1 = textureLod(tex, wave_uv1, lod).r;
+	
+	vec2 wave_uv2 = base_uv + (TIME * velocity);
+	vec4 wave2 = textureLod(tex, wave_uv2 - (wave1 * 0.1), lod);
+	
+	return wave2;
+}
+
+vec3 sample_wave_normal(vec2 uv, vec2 velocity, float center_wave) {
+	vec2 normal_offset = vec2(0.25, 0.0);
+	float wave_x = sample_wave(wave_texture, uv + normal_offset.xy, velocity, wave_softness).r;
+	float wave_z = sample_wave(wave_texture, uv + normal_offset.yx, velocity, wave_softness).r;
+	vec2 slope = vec2(center_wave - wave_x, center_wave - wave_z) * 0.35;
+	return normalize(vec3(slope, 1.0)) * 0.5 + 0.5;
+}
+
+vec2 get_world_wave_velocity(mat4 model_matrix) {
+	float velocity_length = length(wave_velocity);
+	if (velocity_length <= 0.0001) {
+		return vec2(0.0);
+	}
+
+	float flow_direction_length = length(river_flow_direction);
+	if (flow_direction_length > 0.0001) {
+		return (river_flow_direction / flow_direction_length) * velocity_length;
+	}
+
+	vec3 world_direction_3d = (model_matrix * vec4(0.0, 1.0, 0.0, 0.0)).xyz;
+	vec2 world_direction = world_direction_3d.xz;
+	float world_direction_length = length(world_direction);
+	if (world_direction_length <= 0.0001) {
+		return wave_velocity;
+	}
+
+	return (world_direction / world_direction_length) * velocity_length;
+}
+
+void vertex(){
+	world_pos = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
+	world_wave_velocity = get_world_wave_velocity(MODEL_MATRIX);
+	
+	#if USE_DISPLACEMENT
+		float wave = sample_wave(wave_texture, world_pos.xz, world_wave_velocity, wave_softness).r;
+		VERTEX.y += wave*displacement_amount;
+	#endif
+}
+
+void fragment() {
+	float wave = sample_wave(wave_texture, world_pos.xz, world_wave_velocity, wave_softness).r;
+	wave = smoothstep(0.0,1.0,wave);
+	
+	vec2 screen_uv = SCREEN_UV;
+	
+	// Refraction
+	#if USE_REFRACTION
+		screen_uv += ((pow(wave, refraction_exponent)*2.0 - 0.5) * 0.01 * refraction_amount);
+		
+		vec4 world_dpos = sample_world_dpos(screen_uv, INV_PROJECTION_MATRIX, INV_VIEW_MATRIX);
+		
+		float pre_depth = pow(clamp((world_dpos.y - world_pos.y + depth_size)/depth_size, 0.0, 1.0), 4.0);
+		screen_uv = mix(screen_uv, SCREEN_UV, pre_depth);
+		if(world_dpos.y - world_pos.y > 0.0){
+			screen_uv = SCREEN_UV;
+		}
+	#else
+		vec4 world_dpos = sample_world_dpos(screen_uv, INV_PROJECTION_MATRIX, INV_VIEW_MATRIX);
+	#endif
+	
+	world_dpos = sample_world_dpos(screen_uv, INV_PROJECTION_MATRIX, INV_VIEW_MATRIX);
+	
+	vec2 surface_uv = world_dpos.xz * 0.2;
+	
+	float depth = pow(clamp((world_dpos.y - world_pos.y + depth_size)/depth_size, 0.0, 1.0), 4.0);
+	
+	// Caustics
+	#if USE_CAUSTICS
+		vec3 caustics1 = sample_caustics(surface_uv + (TIME * -world_wave_velocity));
+		vec3 caustics2 = sample_caustics((surface_uv + (caustics1.r*0.05)) + (TIME * (world_wave_velocity*0.5)));
+		vec3 caustics = caustics2 * (1.0 - depth);
+	#endif
+	
+	// Edge Foam
+	float edge_foam_depth = clamp((world_dpos.y - world_pos.y + edge_foam_depth_size)/edge_foam_depth_size, 0.0, 1.0);
+	
+	// Wave Foam
+	float wave_foam = wave;
+	float foam = max(edge_foam_depth, wave_foam * wave_foam_amount);
+	
+	float foam_shape = 1.0 - texture(foam_texture, world_pos.xz* 0.5).r;
+	foam = clamp((foam - foam_start) / (foam_end - foam_start), 0.0, 1.0);
+	foam = clamp((foam - foam_shape) / (1.0 - foam_shape), 0.0, 1.0);
+	foam = pow(foam, foam_exponent);
+	
+	vec3 flat_color = mix(depth_color, surface_color, depth).rgb;
+	
+	vec4 screen = texture(screen_texture, screen_uv);
+	vec3 color = screen.rgb;
+	#if USE_CAUSTICS
+		color += vec3(pow(caustics * caustics_strength, vec3(2.0)));
+	#endif
+	color = mix(flat_color, color, 0.4 * depth);
+	color = mix(color, surface_color.rgb, wave * wave_highlight);
+	color = mix(color, foam_color.rgb, foam);
+	
+	#if !USE_UNSHADED
+		vec3 wave_normal_map = sample_wave_normal(world_pos.xz, world_wave_velocity, wave);
+		NORMAL_MAP = wave_normal_map;
+	#endif
+	
+	ROUGHNESS = mix(surface_roughness, foam_roughness, foam);
+	
+	ALBEDO = color;
+}
+
+#if USE_STYLIZED_LIGHTING && !USE_UNSHADED
+	void light(){
+		float ndotl = dot(NORMAL, LIGHT) * ATTENUATION;
+		//ndotl = smoothstep(0.0,1.0-ROUGHNESS,ndotl);
+		float light = ndotl;
+		
+		float light_mult = light * diffuse_steps;
+		float light_step_base = floor(light_mult);
+		float light_factor = light_mult - light_step_base;
+		
+		light_factor = smoothstep(0.5 - diffuse_smoothness * 0.5, 0.5 + diffuse_smoothness * 0.5, light_factor);
+		light = (light_step_base + light_factor) / diffuse_steps;
+		
+		DIFFUSE_LIGHT += (LIGHT_COLOR+ALBEDO) * light / PI;
+		
+		float roughness = mix(0.01, 0.99, ROUGHNESS);
+		vec3 h = normalize(VIEW + LIGHT);
+		float ndoth = clamp(dot(NORMAL, h), 0.0, 1.0) * ATTENUATION;
+		float specular = clamp(pow(ndoth, 16.0/(roughness)), 0.1, 0.99);
+		specular = mix(pow(specular, 2.0-roughness),0.00,pow(roughness, 0.1));
+		
+		float specular_mult = specular * specular_steps;
+		float specular_step_base = floor(specular_mult);
+		float specular_factor = specular_mult - specular_step_base;
+		
+		specular_factor = smoothstep(0.5 - specular_smoothness * 0.5, 0.5 + specular_smoothness * 0.5, specular_factor);
+		specular = (specular_step_base + specular_factor) / specular_steps;
+		
+		SPECULAR_LIGHT += (LIGHT_COLOR + ALBEDO) * specular;
+	}
+#endif

core/daynight/water_river.gdshader.uid

@@ -0,0 +1 @@
+uid://cb12c2j8rfu6a

core/daynight/weather_controller.gd

@@ -14,6 +14,7 @@ var godray: PackedScene
 var environment_dust: ColorRect
 var blur: ColorRect
 var environment_shadows: MeshInstance3D
+var fog: Node3D
 
 var sun: DirectionalLight3D
 var environment: WorldEnvironment
@@ -33,12 +34,15 @@ var rain_tween: Tween
 var rain_audio_tween: Tween
 var puddle_tween: Tween
 var puddle_amount: float = 0.0
+var clouds_tween: Tween
 
 var snow_tween: Tween
+var snow_weather_tween: Tween
 var snow_particles_tween: Tween
 var is_snowing: bool = false
 var is_snow_accumulated: bool = false 
 var actual_snow_amount: float = 0.0
+var snow_weather_amount: float = 0.0
 
 var is_storm: bool = false
 var cold_tween: Tween
@@ -49,10 +53,13 @@ var current_wind_speed: float = 0.0
 var current_wind_strength: float = 0.0
 var current_wind_fade: float = 0.0
 var max_wind_amount: int = 0
+var random_weather_restore_tween: Tween
+var random_event_remaining: float = 0.0
+var random_event_label_seconds: int = -1
 
 func _init(wind: GPUParticles3D, snow: GPUParticles3D, 
 	fireflies: GPUParticles3D, rain: GPUParticles3D, ray: PackedScene,
-	dust: ColorRect, blurr: ColorRect, envshadows: MeshInstance3D,
+	dust: ColorRect, blurr: ColorRect, thefog: Node3D, envshadows: MeshInstance3D,
 	thesun: DirectionalLight3D, theenvironment: WorldEnvironment, environmentconfig: EnvironmentConfig,
 	thecamera: Camera3D, thecamerapivot: Node3D, thundersounds: Array[AudioStream], rainsounds: Array[AudioStream]) -> void:
 	particles_wind = wind
@@ -63,6 +70,7 @@ func _init(wind: GPUParticles3D, snow: GPUParticles3D,
 	sun = thesun
 	environment_dust = dust
 	blur = blurr
+	fog = thefog
 	environment_shadows = envshadows
 	environment = theenvironment
 	environment_config = environmentconfig
@@ -86,6 +94,7 @@ func _init(wind: GPUParticles3D, snow: GPUParticles3D,
 	
 	toggle_dust(environment_config.enable_dust)
 	toggle_blur(environment_config.enable_blur)
+	toggle_fog(environment_config.enable_fog)
 	
 	#set camera pivot if available
 	if camera_pivot:
@@ -98,13 +107,17 @@ func _ready() -> void:
 	UIEvents.toggle_snow.connect(toggle_snow)
 	UIEvents.toggle_wind.connect(toggle_wind)
 	UIEvents.wind_change.connect(change_wind_strength)
+	UIEvents.trigger_random_weather.connect(trigger_random_weather_event)
 	UIEvents.toggle_fireflies.connect(toggle_fireflies)
 	UIEvents.toggle_storm.connect(toggle_storm)
 	UIEvents.toggle_dust.connect(toggle_dust)
 	UIEvents.toggle_blur.connect(toggle_blur)
+	UIEvents.toggle_fog.connect(toggle_fog)
 	UIEvents.toggle_shadows.connect(toggle_shadows)
+	_emit_weather_event_label()
 
 func _process(delta: float) -> void:
+	_update_random_event_label(delta)
 	
 	_follow_camera()
 	
@@ -122,6 +135,7 @@ func _process(delta: float) -> void:
 	var base_grad_top: Color
 	var base_grad_bot: Color
 	var base_grad_intensity: float
+	var base_water_color: Color
 	var base_rotation_sun: Vector3
 
 	if is_raining:
@@ -149,6 +163,7 @@ func _process(delta: float) -> void:
 		base_grad_top = environment_config.grad_top_morning.lerp(environment_config.grad_top_afternoon, t)
 		base_grad_bot = environment_config.grad_top_morning.lerp(environment_config.grad_bot_afternoon, t)
 		base_grad_intensity = lerp(environment_config.grad_intensity_morning, environment_config.grad_intensity_afternoon, t)
+		base_water_color = environment_config.water_color_morning.lerp(environment_config.water_color_afternoon, t)
 		base_rotation_sun = environment_config.sun_rotation_morning.lerp(environment_config.sun_rotation_afternoon, t)
 	else:
 		var t = day_time - 2.0
@@ -162,6 +177,7 @@ func _process(delta: float) -> void:
 		base_grad_top = environment_config.grad_top_afternoon.lerp(environment_config.grad_top_night, t)
 		base_grad_bot = environment_config.grad_bot_afternoon.lerp(environment_config.grad_bot_night, t)
 		base_grad_intensity = lerp(environment_config.grad_intensity_afternoon, environment_config.grad_intensity_night, t)
+		base_water_color = environment_config.water_color_afternoon.lerp(environment_config.water_color_night, t)
 		base_rotation_sun = environment_config.sun_rotation_afternoon.lerp(environment_config.sun_rotation_night, t)
 		
 	var weather_color = environment_config.rain_mode_color
@@ -173,11 +189,12 @@ func _process(delta: float) -> void:
 	var final_sky_horizon = base_sky_horizon.lerp(base_sky_horizon * weather_color, clamp(rain_intensity, 0.0, 1.0))
 	var final_fog_color = base_fog_color.lerp(base_fog_color * weather_color, clamp(rain_intensity, 0.0, 1.0))
 	var final_fog_density = lerp(base_fog_density, base_fog_density * 4.0, clamp(rain_intensity, 0.0, 1.0)) 
+	var final_water_color = base_water_color.darkened(clamp(environment_config.water_darkening_rain, 0.0, 1.0) * clamp(rain_intensity, 0.0, 1.0))
 
-	final_tint = final_tint.lerp(final_tint * environment_config.snow_mode_color, actual_snow_amount)
-	final_sky_top = final_sky_top.lerp(final_sky_top * environment_config.snow_mode_color, actual_snow_amount)
-	final_sky_horizon = final_sky_horizon.lerp(final_sky_horizon * environment_config.snow_mode_color, actual_snow_amount)
-	final_fog_color = final_fog_color.lerp(final_fog_color * environment_config.snow_mode_color, actual_snow_amount)
+	final_tint = final_tint.lerp(final_tint * environment_config.snow_mode_color, snow_weather_amount)
+	final_sky_top = final_sky_top.lerp(final_sky_top * environment_config.snow_mode_color, snow_weather_amount)
+	final_sky_horizon = final_sky_horizon.lerp(final_sky_horizon * environment_config.snow_mode_color, snow_weather_amount)
+	final_fog_color = final_fog_color.lerp(final_fog_color * environment_config.snow_mode_color, snow_weather_amount)
 	
 	#Shader parameters for global trunk_shader
 	var final_grad_top = base_grad_top.lerp(base_grad_top * weather_color, clamp(rain_intensity, 0.0, 1.0))
@@ -186,12 +203,13 @@ func _process(delta: float) -> void:
 	RenderingServer.global_shader_parameter_set("global_gradient_color_top", final_grad_top)
 	RenderingServer.global_shader_parameter_set("global_gradient_color_bot", final_grad_bot)
 	RenderingServer.global_shader_parameter_set("global_gradient_intensity", base_grad_intensity)
+	RenderingServer.global_shader_parameter_set("global_water_color", final_water_color)
 	
 	var night_val = clamp(day_time - 2.0, 0.0, 1.0)
 	
 	#Snow exposure compensation
-	var snow_light_attenuation = lerp(1.0, 0.55, actual_snow_amount * (1.0 - night_val))
-	var snow_glow_attenuation = lerp(1.0, 0.5, actual_snow_amount)
+	var snow_light_attenuation = lerp(1.0, 0.55, snow_weather_amount * (1.0 - night_val))
+	var snow_glow_attenuation = lerp(1.0, 0.5, snow_weather_amount)
 	var final_bloom = lerp(base_bloom, base_bloom * 0.5, rain_intensity) * snow_glow_attenuation
 	
 	# We calculate the final exposure by applying snow damping directly to the camera exposure
@@ -232,16 +250,37 @@ func _process(delta: float) -> void:
 			sky_mat.set_shader_parameter("sun_color", final_tint)
 			sky_mat.set_shader_parameter("night_intensity", night_val)
 			
+		var cloud_density_amount: float = maxf(clamp(rain_intensity, 0.0, 1.0), clamp(snow_weather_amount, 0.0, 1.0))
+		var current_cloud_density: float = lerp(environment_config.base_cloud_density, environment_config.rain_cloud_density, cloud_density_amount)
+		
 		if environment_config.material_clouds:
-			var current_density = lerp(0.4, 1.0, rain_intensity)
-			environment_config.material_clouds.set_shader_parameter("cloud_density", current_density)
-			var current_sharpness = lerp(0.14, 0.0, rain_intensity)
+			environment_config.material_clouds.set_shader_parameter("cloud_density", current_cloud_density)
+			var current_sharpness = lerp(0.14, 0.0, cloud_density_amount)
 			environment_config.material_clouds.set_shader_parameter("center_sharpness", current_sharpness)
 			
+		var env_shadow_mat = environment_shadows.get_surface_override_material(0) if environment_shadows else null
+		if env_shadow_mat:
+			env_shadow_mat.set_shader_parameter("cloud_density", current_cloud_density)
+		
 		if environment_config.material_fog:
+			environment_config.material_fog.set_shader_parameter("fog_color", final_fog_color)
+			environment_config.material_fog.set_shader_parameter("fog_density", clamp(final_fog_density * 25.0, 0.0, 1.0))
 			environment_config.material_fog.set_shader_parameter("night_intensity", night_val)
 			environment_config.material_fog.set_shader_parameter("sun_color", final_tint)
 		
+		if fog:
+			for child in fog.get_children():
+				var fog_mesh := child as MeshInstance3D
+				if fog_mesh == null:
+					continue
+				var fog_material := fog_mesh.get_surface_override_material(0) as ShaderMaterial
+				if fog_material == null:
+					continue
+				fog_material.set_shader_parameter("fog_color", final_fog_color)
+				fog_material.set_shader_parameter("fog_density", clamp(final_fog_density * 25.0, 0.0, 1.0))
+				fog_material.set_shader_parameter("night_intensity", night_val)
+				fog_material.set_shader_parameter("sun_color", final_tint)
+
 func create_sound_players():
 	rain_audio_player = AudioStreamPlayer.new()
 	rain_audio_player.name = "RainAudioPlayer"
@@ -265,6 +304,23 @@ func _get_weather_anchor_position() -> Variant:
 		return camera.global_position
 	return null
 
+func _get_weather_anchor_basis() -> Variant:
+	var source_basis: Basis
+	if camera_pivot and is_instance_valid(camera_pivot):
+		source_basis = camera_pivot.global_basis
+	elif camera and is_instance_valid(camera):
+		source_basis = camera.global_basis
+	else:
+		return null
+
+	var forward := -source_basis.z
+	forward.y = 0.0
+	if forward.length_squared() <= 0.0001:
+		return Basis.IDENTITY
+	forward = forward.normalized()
+	var right := forward.cross(Vector3.UP).normalized()
+	return Basis(right, Vector3.UP, -forward)
+
 func _follow_camera() -> void:
 	var cam_pos = _get_weather_anchor_position()
 	if cam_pos == null:
@@ -277,6 +333,12 @@ func _follow_camera() -> void:
 		particles_wind.global_position = Vector3(cam_pos.x, cam_pos.y, cam_pos.z)
 	if particles_fireflies:
 		particles_fireflies.global_position = Vector3(cam_pos.x, particles_fireflies.position.y, cam_pos.z)
+	if fog:
+		fog.global_position = Vector3(cam_pos.x, fog.global_position.y, cam_pos.z)
+		#used to follow camera pivot or camera
+		var anchor_basis = _get_weather_anchor_basis()
+		if anchor_basis != null:
+			fog.global_basis = anchor_basis
 #endregion
 
 #region Fireflies
@@ -307,6 +369,7 @@ func toggle_wind(value: bool):
 		particles_wind.emitting = is_windy
 
 	_apply_wind_state()
+	_emit_weather_event_label()
 
 #disable wind and set default values and materials
 func init_wind():
@@ -410,6 +473,67 @@ func _update_wind_amount_from_strength(value: float) -> void:
 
 	environment_config.wind_amount = roundi(max_wind_amount * amount_ratio)
 
+func trigger_random_weather_event(duration: float = 0.0) -> void:
+	if random_weather_restore_tween and random_weather_restore_tween.is_valid():
+		random_weather_restore_tween.kill()
+	random_event_remaining = 0.0
+	random_event_label_seconds = -1
+
+	var previous_rain: bool = is_raining
+	var previous_snow: bool = is_snowing
+	var previous_wind: bool = is_windy
+	var previous_storm: bool = is_storm
+	var random_event_index: int = randi_range(0, 3)
+	match random_event_index:
+		0:
+			_apply_weather_event_state(false, true, false, false)
+		1:
+			_apply_weather_event_state(true, false, false, false)
+		2:
+			_apply_weather_event_state(false, false, true, false)
+		_:
+			_apply_weather_event_state(true, false, false, true)
+
+	if duration > 0.0:
+		random_event_remaining = duration
+		_emit_weather_event_label()
+		random_weather_restore_tween = create_tween()
+		random_weather_restore_tween.tween_interval(duration)
+		random_weather_restore_tween.tween_callback(func():
+			random_event_remaining = 0.0
+			random_event_label_seconds = -1
+			_apply_weather_event_state(previous_rain, previous_snow, previous_wind, previous_storm)
+		)
+
+func _update_random_event_label(delta: float) -> void:
+	if random_event_remaining <= 0.0:
+		return
+
+	random_event_remaining = maxf(random_event_remaining - delta, 0.0)
+	var display_seconds: int = ceili(random_event_remaining)
+	if display_seconds != random_event_label_seconds:
+		random_event_label_seconds = display_seconds
+		_emit_weather_event_label()
+
+func _apply_weather_event_state(rain_enabled: bool, snow_enabled: bool, wind_enabled: bool, storm_enabled: bool = false) -> void:
+	if is_storm and not storm_enabled:
+		toggle_storm(false)
+	if is_raining and not rain_enabled:
+		toggle_rain(false)
+	if is_snowing and not snow_enabled:
+		toggle_snow(false)
+	if is_windy and not wind_enabled:
+		toggle_wind(false)
+
+	if not is_raining and rain_enabled:
+		toggle_rain(true)
+	if not is_snowing and snow_enabled:
+		toggle_snow(true)
+	if not is_windy and wind_enabled:
+		toggle_wind(true)
+	if not is_storm and storm_enabled:
+		toggle_storm(true)
+
 func _apply_cloud_config() -> void:
 	var dir = environment_config.wind_direction
 	var cloud_scale = environment_config.cloud_scale
@@ -441,6 +565,7 @@ func _apply_cloud_config() -> void:
 
 func toggle_storm(value: bool):
 	is_storm = value
+	_emit_weather_event_label()
 
 #set lightning
 func init_lightning():
@@ -554,6 +679,7 @@ func toggle_rain(value: bool):
 	is_raining = value
 	
 	if not particles_rain:
+		_emit_weather_event_label()
 		return
 	
 	if is_raining and is_snowing:
@@ -587,6 +713,7 @@ func toggle_rain(value: bool):
 			trigger_after_rain())
 		puddle_tween = create_tween()
 		puddle_tween.tween_method(set_puddle_amount, puddle_amount, 0.0, environment_config.puddle_dry_time)
+	_emit_weather_event_label()
 
 func trigger_morning() -> void:
 	spawn_single_godray()
@@ -683,12 +810,47 @@ func toggle_snow(value: bool):
 	var target_snow_amount: float = 1.0 if is_snowing else 0.0
 	if snow_tween and snow_tween.is_valid():
 		snow_tween.kill()
+	if snow_weather_tween and snow_weather_tween.is_valid():
+		snow_weather_tween.kill()
+	var snow_amount_transition_duration: float = _get_snow_amount_transition_duration(is_snowing)
 	snow_tween = create_tween()
-	snow_tween.tween_method(init_snow_amount, actual_snow_amount, target_snow_amount, environment_config.snow_transaction_time)
+	snow_tween.tween_method(
+		init_snow_amount,
+		actual_snow_amount,
+		target_snow_amount,
+		snow_amount_transition_duration
+	)
+	snow_weather_tween = create_tween()
+	snow_weather_tween.tween_method(
+		init_snow_weather_amount,
+		snow_weather_amount,
+		target_snow_amount,
+		environment_config.snow_fade_time
+	)
+	_emit_weather_event_label()
+
+func _emit_weather_event_label() -> void:
+	var weather_label := "Weather: Clear"
+	if is_storm:
+		weather_label = "Weather: Storm"
+	else:
+		var active_events: Array[String] = []
+		if is_snowing:
+			active_events.append("Snow")
+		if is_raining:
+			active_events.append("Rain")
+		if is_windy:
+			active_events.append("Wind")
+		if not active_events.is_empty():
+			weather_label = "Weather: %s" % " + ".join(active_events)
+	if random_event_remaining > 0.0:
+		weather_label += " (%s'')" % ceili(random_event_remaining)
+	UIEvents.weather_event_changed.emit(weather_label)
 
 #disable snow and set default values and shader
 func init_snow(value: float = 0.0):
 	actual_snow_amount = value
+	snow_weather_amount = value
 	RenderingServer.global_shader_parameter_set("global_snow_amount", value)
 	
 	if particles_snow:
@@ -699,6 +861,13 @@ func init_snow(value: float = 0.0):
 		RenderingServer.global_shader_parameter_set("global_snow_color", environment_config.snow_color)
 		RenderingServer.global_shader_parameter_set("global_snow_accumulation_speed", environment_config.snow_accumulation_speed)
 		RenderingServer.global_shader_parameter_set("global_snow_melt_speed", environment_config.snow_melt_speed)
+		RenderingServer.global_shader_parameter_set("global_snow_max_accumulation", environment_config.snow_max_accumulation)
+		RenderingServer.global_shader_parameter_set("global_snow_cap_enabled", environment_config.show_snow_accumulation_volume)
+		RenderingServer.global_shader_parameter_set("global_snow_cap_height", environment_config.snow_cap_height)
+		RenderingServer.global_shader_parameter_set("global_snow_cap_flatness_start", environment_config.snow_cap_flatness_start)
+		RenderingServer.global_shader_parameter_set("global_snow_cap_flatness_end", environment_config.snow_cap_flatness_end)
+		RenderingServer.global_shader_parameter_set("global_snow_cap_noise_scale", environment_config.snow_cap_noise_scale)
+		RenderingServer.global_shader_parameter_set("global_snow_cap_noise_strength", environment_config.snow_cap_noise_strength)
 		RenderingServer.global_shader_parameter_set("global_snow_start_time", -1.0)
 		RenderingServer.global_shader_parameter_set("global_snow_melt_time", -1.0)
 		
@@ -706,6 +875,9 @@ func init_snow_amount(value: float):
 	actual_snow_amount = value
 	RenderingServer.global_shader_parameter_set("global_snow_amount", value)
 
+func init_snow_weather_amount(value: float):
+	snow_weather_amount = value
+
 func start_snow_accumulation() -> void:
 	RenderingServer.global_shader_parameter_set("global_snow_melt_time", -1.0)
 	RenderingServer.global_shader_parameter_set("global_snow_start_time", Time.get_ticks_msec() / 1000.0)
@@ -714,6 +886,18 @@ func start_snow_melt() -> void:
 	RenderingServer.global_shader_parameter_set("global_snow_melt_time", Time.get_ticks_msec() / 1000.0)
 	RenderingServer.global_shader_parameter_set("global_snow_melt_speed", environment_config.snow_melt_speed)
 
+func _get_snow_amount_transition_duration(is_accumulating: bool) -> float:
+	if environment_config == null:
+		return 0.0
+
+	var speed: float = environment_config.snow_melt_speed
+	if is_accumulating:
+		speed = environment_config.snow_accumulation_speed
+	if speed <= 0.0:
+		return environment_config.snow_transaction_time
+
+	return 1.0 / speed
+
 #endregion
 
 #region Post-Process
@@ -728,6 +912,10 @@ func toggle_blur(value: bool) -> void:
 
 	ApplyPostProcessBlurConfig()
 
+func toggle_fog(value: bool) -> void:
+	if fog:
+		fog.visible = value
+
 func toggle_shadows(value: bool) -> void:
 	if environment_shadows:
 		environment_shadows.visible = value

core/daynight/weather_overlay.gdshader

@@ -3,11 +3,19 @@ render_mode blend_mix, depth_draw_never;
 
 //Snow globals
 global uniform float global_snow_start_time        = -1.0;
-global uniform float global_snow_accumulation_speed = 0.1;
+global uniform float global_snow_accumulation_speed = 0.005;
 global uniform float global_snow_melt_time         = -1.0;
 global uniform float global_snow_melt_speed        = 0.1;
+global uniform float global_snow_amount            = 0.0;
 global uniform float global_snow_threshold         = 0.5;
 global uniform vec4  global_snow_color             = vec4(0.92, 0.96, 1.0, 1.0);
+global uniform float global_snow_max_accumulation  = 0.72;
+global uniform bool global_snow_cap_enabled       = true;
+global uniform float global_snow_cap_height        = 0.06;
+global uniform float global_snow_cap_flatness_start = 0.72;
+global uniform float global_snow_cap_flatness_end  = 0.96;
+global uniform float global_snow_cap_noise_scale   = 0.22;
+global uniform float global_snow_cap_noise_strength = 0.18;
 uniform float snow_noise_scale : hint_range(0.01, 1.0) = 0.15;
 uniform float snow_edge_softness : hint_range(0.01, 0.5) = 0.2;
 uniform float snow_roughness_variation : hint_range(0.0, 0.3) = 0.15;
@@ -29,6 +37,55 @@ uniform float puddle_threshold : hint_range(0.0, 0.8) = 0.45;
 
 uniform sampler2D noise_texture : filter_linear_mipmap, repeat_enable;
 
+varying float v_snow_amount;
+varying float v_snow_cap_mask;
+
+float hash(vec2 p) {
+    return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
+}
+
+float value_noise(vec2 p) {
+    vec2 i = floor(p);
+    vec2 f = fract(p);
+    vec2 u = f * f * (3.0 - 2.0 * f);
+
+    float a = hash(i);
+    float b = hash(i + vec2(1.0, 0.0));
+    float c = hash(i + vec2(0.0, 1.0));
+    float d = hash(i + vec2(1.0, 1.0));
+
+    return mix(mix(a, b, u.x), mix(c, d, u.x), u.y);
+}
+
+float fbm(vec2 p) {
+    float value = 0.0;
+    float amplitude = 0.5;
+    float frequency = 1.0;
+
+    for (int i = 0; i < 3; i++) {
+        value += value_noise(p * frequency) * amplitude;
+        frequency *= 2.0;
+        amplitude *= 0.5;
+    }
+
+    return clamp(value, 0.0, 1.0);
+}
+
+float get_snow_progress() {
+    float snow_progress = clamp(global_snow_amount, 0.0, 1.0);
+
+    if (global_snow_start_time >= 0.0) {
+        float timed_progress = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
+        snow_progress = max(snow_progress, timed_progress);
+    }
+    if (global_snow_melt_time >= 0.0) {
+        float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
+        snow_progress = min(snow_progress, 1.0 - melt);
+    }
+
+    return snow_progress;
+}
+
 float ripple_ring(vec2 uv, float time_offset) {
     float d = length(uv);
     float ring = sin(d * 30.0 - TIME * ripple_speed + time_offset) * 0.5 + 0.5;
@@ -36,6 +93,27 @@ float ripple_ring(vec2 uv, float time_offset) {
     return ring * fade;
 }
 
+void vertex() {
+    float snow_progress = get_snow_progress();
+    float snow_accumulation = snow_progress * global_snow_max_accumulation;
+    vec3 world_pos = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
+    vec3 world_normal = normalize((MODEL_MATRIX * vec4(NORMAL, 0.0)).xyz);
+
+    float flat_surface = smoothstep(
+        max(global_snow_threshold, global_snow_cap_flatness_start),
+        global_snow_cap_flatness_end,
+        world_normal.y
+    );
+    float accumulation_growth = smoothstep(0.08, 0.65, snow_progress);
+    float cap_noise = fbm(world_pos.xz * global_snow_cap_noise_scale + vec2(11.3, 4.7));
+    float cap_variation = mix(1.0 - global_snow_cap_noise_strength, 1.0 + global_snow_cap_noise_strength, cap_noise);
+
+    v_snow_amount = snow_progress;
+    v_snow_cap_mask = flat_surface * accumulation_growth * cap_variation * (global_snow_cap_enabled ? 1.0 : 0.0);
+
+    VERTEX += NORMAL * (global_snow_cap_height * snow_accumulation * v_snow_cap_mask);
+}
+
 void fragment() {
     vec3 world_pos = (INV_VIEW_MATRIX * vec4(VERTEX, 1.0)).xyz;
     vec3 world_normal = normalize((INV_VIEW_MATRIX * vec4(NORMAL, 0.0)).xyz);
@@ -43,25 +121,24 @@ void fragment() {
     float noise_val = texture(noise_texture, world_pos.xz * snow_noise_scale).r;
 
     //Snow
-    float snow_amount = 0.0;
-    if (global_snow_start_time >= 0.0) {
-        snow_amount = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
-    }
-    if (global_snow_melt_time >= 0.0) {
-        float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
-        snow_amount *= (1.0 - melt);
-    }
+    float snow_progress = v_snow_amount;
+    float snow_accumulation = snow_progress * global_snow_max_accumulation;
 
     float snow_edge = smoothstep(
         global_snow_threshold - snow_edge_softness,
         global_snow_threshold + snow_edge_softness,
-        facing_up + (noise_val - 0.5) * 0.4
+        facing_up
     );
-    float snow_coverage = smoothstep(0.0, 0.6, noise_val + snow_amount - 0.4);
-    float snow_factor = snow_edge * snow_coverage * snow_amount;
+    float flat_accumulation = smoothstep(0.0, 0.35, v_snow_cap_mask) * snow_accumulation;
+    float snow_variation = mix(0.75, 1.15, noise_val);
+    float snow_coverage = clamp(snow_progress * snow_variation + flat_accumulation * 0.25, 0.0, 1.0);
+    float snow_factor = max(snow_edge * snow_coverage, flat_accumulation);
+    float snow_opacity = clamp(snow_factor, 0.0, 1.0);
+    snow_opacity = max(snow_opacity, flat_accumulation * 0.9);
 
     float shade = mix(-snow_color_variation, snow_color_variation, noise_val);
     vec3 snow_albedo = clamp(global_snow_color.rgb + vec3(shade), 0.0, 1.0);
+    snow_albedo = mix(snow_albedo, vec3(1.0), 0.18 + snow_opacity * 0.12);
     float snow_rough = mix(0.15 - snow_roughness_variation, 0.15 + snow_roughness_variation, noise_val);
 
     //Rain
@@ -173,7 +250,7 @@ void fragment() {
         ALBEDO    = snow_albedo;
         ROUGHNESS = snow_rough;
         METALLIC  = 0.0;
-        ALPHA     = snow_factor;
+        ALPHA     = snow_opacity;
     } else {
         ALBEDO    = rain_albedo;
         ROUGHNESS = rain_rough;

core/daynight/weather_plain_shader.gdshader

@@ -2,21 +2,19 @@ shader_type spatial;
 render_mode blend_mix, depth_draw_never, cull_disabled;
 
 // Snow globals
-global uniform float global_snow_start_time;
-global uniform float global_snow_accumulation_speed;
-global uniform float global_snow_melt_time;
-global uniform float global_snow_melt_speed;
+global uniform float global_snow_start_time = -1.0;
+global uniform float global_snow_accumulation_speed = 0.005;
+global uniform float global_snow_melt_time = -1.0;
+global uniform float global_snow_melt_speed = 0.1;
+global uniform float global_snow_amount = 0.0;
 global uniform vec4  global_snow_color;
-
-// Rain globals
-global uniform float global_rain_intensity;
-global uniform float global_rain_puddle_amount;
-
-// Snow parameters
 uniform float snow_edge_softness : hint_range(0.01, 0.5) = 0.15;
 uniform float snow_color_variation : hint_range(0.0, 0.15) = 0.05;
 
+
 // Rain wetness parameters
+global uniform float global_rain_intensity;
+global uniform float global_rain_puddle_amount;
 uniform float ripple_scale : hint_range(0.1, 5.0) = 1.5;
 uniform float ripple_speed : hint_range(0.5, 5.0) = 2.0;
 uniform float ripple_layers : hint_range(1.0, 4.0) = 3.0;
@@ -37,6 +35,21 @@ float ripple_ring(vec2 uv, float time_offset) {
 	return ring * fade;
 }
 
+float get_snow_progress() {
+	float snow_progress = clamp(global_snow_amount, 0.0, 1.0);
+
+	if (global_snow_start_time >= 0.0) {
+		float timed_progress = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
+		snow_progress = max(snow_progress, timed_progress);
+	}
+	if (global_snow_melt_time >= 0.0) {
+		float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
+		snow_progress = min(snow_progress, 1.0 - melt);
+	}
+
+	return snow_progress;
+}
+
 void fragment() {
 	vec3 world_pos = (INV_VIEW_MATRIX * vec4(VERTEX, 1.0)).xyz;
 
@@ -44,18 +57,10 @@ void fragment() {
 	float facing_up = 1.0;
 
 	// Snow accumulation
-	float snow_amount = 0.0;
-	if (global_snow_start_time >= 0.0) {
-		snow_amount = clamp((TIME - global_snow_start_time) * global_snow_accumulation_speed, 0.0, 1.0);
-	}
-	if (global_snow_melt_time >= 0.0) {
-		float melt = clamp((TIME - global_snow_melt_time) * global_snow_melt_speed, 0.0, 1.0);
-		snow_amount *= (1.0 - melt);
-	}
+	float snow_amount = get_snow_progress();
 
-	// UV-based snow mask: accumulates from the top of the quad
-	float top_mask = 1.0 - UV.y;
-	float snow_mask = smoothstep(1.0 - snow_amount, 1.0 - snow_amount + snow_edge_softness, top_mask);
+	// Plain surfaces fade in uniformly to avoid patchy strip-like accumulation.
+	float snow_mask = smoothstep(0.0, 1.0, snow_amount);
 	snow_mask *= step(0.01, snow_amount);
 
 	// Snow color with slight variation

core/daynight/weather_plain_shader.tres

@@ -1,7 +1,21 @@
-[gd_resource type="ShaderMaterial" format=3]
+[gd_resource type="ShaderMaterial" format=3 uid="uid://b34bnqbrtxktw"]
 
-[ext_resource type="Shader" path="res://core/daynight/weather_plain_shader.gdshader" id="1_weather_plain"]
+[ext_resource type="Shader" uid="uid://do8puw7u8dvry" path="res://core/daynight/weather_plain_shader.gdshader" id="1_weather_plain"]
+[ext_resource type="Texture2D" uid="uid://bpswbjh4jj1ou" path="res://core/daynight/noise.tres" id="2_noise"]
 
 [resource]
 render_priority = 0
 shader = ExtResource("1_weather_plain")
+shader_parameter/snow_edge_softness = 0.15
+shader_parameter/snow_color_variation = 0.05
+shader_parameter/ripple_scale = 1.5
+shader_parameter/ripple_speed = 2.0
+shader_parameter/ripple_layers = 3.0
+shader_parameter/streak_scale = 2.0
+shader_parameter/streak_speed = 0.8
+shader_parameter/wetness_darkening = 0.25
+shader_parameter/wet_roughness = 0.05
+shader_parameter/rain_normal_strength = 0.4
+shader_parameter/puddle_noise_scale = 0.08
+shader_parameter/puddle_threshold = 0.45
+shader_parameter/noise_texture = ExtResource("2_noise")

core/daynight/wind.gdshader

@@ -1,31 +1,26 @@
 shader_type spatial;
 render_mode unshaded;
 
-global uniform float global_wind_speed     = 1.0; //0.0 = calm, 1.0 = normal, 2.0+ = strong
-global uniform vec2  global_wind_direction  = vec2(1.0, 0.0);
-
-uniform float wave_frequency  = 1.0;
-uniform float base_amplitude  = 0.5;
-uniform float secondary_ratio = 0.6;
-uniform float time_scale_base = 3.0;
+// --- PARAMETRI ---
+uniform float time_scale = 3.0;
+uniform float wave_amplitude = 0.5; // Quanto curva a destra/sinistra
+uniform float wave_frequency = 1.0; // Ogni quanto fa la curva
 
 void vertex() {
+    // Creiamo un offset unico per ogni particella in modo che non si muovano tutte uguali
     float random_seed_offset = INSTANCE_CUSTOM.x * 100.0; 
-    float scaled_time = (TIME + random_seed_offset) * (time_scale_base * global_wind_speed);
-    float amplitude   = base_amplitude * global_wind_speed;
+    float scaled_time = (TIME + random_seed_offset) * time_scale;
     
-    vec2 wind_dir  = normalize(global_wind_direction);
-    vec2 wind_perp = vec2(-wind_dir.y, wind_dir.x); //90° perpendicular
+    // Applichiamo SOLO la curva morbida all'asse X (o Z, a seconda di come orienti la scena)
+    // Usiamo VERTEX.y per far sì che la curva si propaghi lungo tutta la lunghezza della scia
+    VERTEX.x += sin(VERTEX.y * wave_frequency + scaled_time) * wave_amplitude;
     
-    float primary_sway   = sin(VERTEX.y * wave_frequency + scaled_time) * amplitude;
-    float secondary_sway = sin(VERTEX.y * wave_frequency * 1.3 + scaled_time * 0.7 + 1.57)
-                           * (amplitude * secondary_ratio);
-
-    VERTEX.x += primary_sway * wind_dir.x  + secondary_sway * wind_perp.x;
-    VERTEX.z += primary_sway * wind_dir.y  + secondary_sway * wind_perp.y;
+    // Niente più "VERTEX.y += t;", quindi niente più teletrasporti!
 }
 
 void fragment() {
+    // Il colore e l'alpha (per lo spawn dolce e la morte lenta) 
+    // vengono comandati dalla Color Ramp del GPUParticles3D!
     ALBEDO = COLOR.rgb;
     ALPHA = COLOR.a;
 }

core/environment_config.gd

@@ -81,8 +81,9 @@ extends Resource
 #Post-process effect toggles (initial values)
 @export_group("Post Process")
 @export var enable_dust: bool = false #Floating dust particles overlay
-@export var enable_blur: bool = false #Screen blur effect
+@export var enable_blur: bool = true #Screen blur effect
 @export var enable_environment_shadows: bool = true #Cloud shadow projection on terrain
+@export var enable_fog: bool = false #Enable fog around the train
 @export var blur_amount: float = 0.6
 
 @export_group("Dust")
@@ -97,6 +98,7 @@ extends Resource
 @export var material_fog: ShaderMaterial #Fog overlay shader material
 @export var material_drops: StandardMaterial3D #Rain drops material (albedo tinted by sky)
 @export var material_clouds: ShaderMaterial #Cloud layer shader material
+@export var base_cloud_density: float = 0.4 #default cloud density
 
 #Rain weather settings
 @export_group("Rain")
@@ -105,6 +107,7 @@ extends Resource
 @export var rain_audio_volume_db: float = -10.0 #Target rain loop volume in decibels
 @export var puddle_form_time: float = 15.0 #Seconds for puddles to fully form
 @export var puddle_dry_time: float = 20.0 #Seconds for puddles to fully dry after rain stops
+@export var rain_cloud_density: float = 1.0 #the cloud density when is rainy
 
 #Storm settings (applied on top of rain when storm is active)
 @export_group("Storm")
@@ -133,15 +136,27 @@ extends Resource
 @export var godray_spawn_height: float = 5.0 #Y world position where god rays spawn
 @export var godray_scale: Vector3 = Vector3(2.0, 6.0, 2.0) #Scale of the god ray mesh
 
+#Train start settings
+@export_group("Train Start")
+@export var train_start_from_random_position: bool = true #When enabled the train starts from a random offset on the rail curve instead of a stop
+@export_range(0, 64, 1, "or_greater") var train_start_stop_index: int = 1 #Stop index used for the train start when random start is disabled
+
 #Snow settings
 @export_group("Snow")
 @export var snow_amount: float = 0.0 #Initial snow coverage amount (0.0 = none, 1.0 = full)
 @export var snow_transaction_time: float = 10.0 #Seconds for snow shader to fully transition in/out
 @export var snow_fade_time: float = 5.0 #Seconds for snow particles to fade in/out
 @export var snow_threshold: float = 0.4 #Normal Y threshold for snow accumulation on surfaces
-@export var snow_accumulation_speed: float = 0.02 #Accumulation speed: 0.1 -> 10s, 0.05 -> 20s, 0.02 -> 50s, 0.2 -> 5s
+@export var snow_accumulation_speed: float = 0.005 #Accumulation speed: 0.005 -> ~200s, 0.01 -> 100s, 0.02 -> 50s
 @export var snow_melt_speed: float = 0.05 #Speed at which accumulated snow melts away
+@export var show_snow_accumulation_volume: bool = true #Enables vertex snow buildup; when false snow only changes surface color
+@export var snow_max_accumulation: float = 0.25 #Maximum accumulated snow factor applied to coverage and thickness
 @export var snow_color: Color = Color(0.9, 0.95, 1.0) #Albedo color of snow on surfaces
+@export var snow_cap_height: float = 0.03 #Maximum snow thickness extruded on flat surfaces
+@export var snow_cap_flatness_start: float = 0.85 #Surface normal Y where cap buildup starts
+@export var snow_cap_flatness_end: float = 0.96 #Surface normal Y where cap buildup reaches full effect
+@export var snow_cap_noise_scale: float = 0.22 #Noise scale used to vary the snow cap silhouette
+@export var snow_cap_noise_strength: float = 0.12 #How much the cap noise changes the accumulated thickness
 @export var snow_mode_color: Color = Color(0.556, 0.62, 0.683, 1.0) #Sky/light darkening color during snow
 
 #Wind settings
@@ -152,7 +167,7 @@ extends Resource
 @export var wind_direction: Vector2 = Vector2(0.5, 0.4) #Global wind direction (XZ)
 @export var wind_speed: float = 0.2 #Global wind animation speed
 @export var wind_scale: float = 0.025 #Global wind noise scale
-@export var wind_strength: float = 0.6 #Global wind displacement strength
+@export var wind_strength: float = 0.3 #Global wind displacement strength
 @export var cloud_scale: float = 0.5 #Cloud noise scale in sky shader
 @export var cloud_speed: float = 0.05 #Cloud movement speed in sky shader
 @export_range(0.01, 1.0) var cloud_scale_envshadows_rate: float = 0.01 #Cloud scale multiplier for environment shadows
@@ -164,3 +179,14 @@ extends Resource
 @export var fireflies_amount: int = 60 #Number of firefly particles
 @export var fireflies_spawn_ray: float = 20.0 #Horizontal spawn radius
 @export var fireflies_spawn_height: float = 3.0 #Vertical spawn range
+
+#Water settings
+@export_group("Water")
+@export var water_color_morning: Color = Color(0.285, 0.534, 0.487, 1.0) #Tint for morning
+@export var water_color_afternoon: Color = Color(0.889, 0.733, 0.205, 1.0) #Tint for afternoon (sunset)
+@export var water_color_night: Color = Color(0.728, 0.54, 0.986, 1.0); #Tint for night
+@export var water_darkening_rain: float = 0.7 #Percentage of darkening when is rainy
+
+#Random events
+@export_group("Random Events")
+@export var random_event_duration: float = 30.0 #Duration time for random event

core/game_menu/arrow_button.gd

@@ -0,0 +1,29 @@
+@tool
+extends Control
+
+class_name ArrowButton
+
+signal on_pressed
+
+@export var image: Texture:
+	set(value):
+		image = value
+		if is_inside_tree() and has_node("%Texture"):
+			$%Texture.texture = image
+
+@export var flip_h: bool = false:
+	set(value):
+		flip_h = value
+		if is_inside_tree() and has_node("%Texture"):
+			if $%Texture != null:
+				$%Texture.flip_h = flip_h
+
+func _ready():
+	if image != null and has_node("%Texture"):
+		$%Texture.texture = image
+		$%Texture.flip_h = flip_h
+		
+
+func _on_gui_input(event: InputEvent) -> void:
+	if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and event.pressed:
+		on_pressed.emit()

core/game_menu/arrow_button.gd.uid

@@ -0,0 +1 @@
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core/game_menu/arrow_button.tscn

@@ -0,0 +1,38 @@
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+
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+[ext_resource type="Script" uid="uid://3uxuhvua1036" path="res://core/game_menu/arrow_button.gd" id="2_xq7pl"]
+[ext_resource type="PackedScene" uid="uid://dxun0jk5t0n6" path="res://core/game_menu/hoover_tween.tscn" id="3_hu4cn"]
+
+[node name="ArrowButton" type="Control" unique_id=1696751730]
+custom_minimum_size = Vector2(101, 124)
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+pivot_offset = Vector2(0.5, 0.5)
+script = ExtResource("2_xq7pl")
+image = ExtResource("1_vbu0v")
+
+[node name="Texture" type="TextureRect" parent="." unique_id=91599097]
+unique_name_in_owner = true
+layout_mode = 1
+anchors_preset = -1
+anchor_left = 0.47369793
+anchor_top = 0.4425926
+anchor_right = 0.5263021
+anchor_bottom = 0.5574074
+grow_horizontal = 2
+grow_vertical = 2
+pivot_offset_ratio = Vector2(0.5, 0.5)
+mouse_filter = 2
+texture = ExtResource("1_vbu0v")
+metadata/_edit_use_anchors_ = true
+
+[node name="HooverTween" parent="." unique_id=2115829120 node_paths=PackedStringArray("detector_node", "visual_node") instance=ExtResource("3_hu4cn")]
+detector_node = NodePath("..")
+visual_node = NodePath("../Texture")
+
+[connection signal="gui_input" from="." to="." method="_on_gui_input"]

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