add config comment

core/daynight/environment_manager.gd

@@ -12,14 +12,17 @@ extends Node3D
 @export var particles_fireflies: GPUParticles3D
 @export var particles_rain: GPUParticles3D
 @export var godray: PackedScene
-@export var fog_overlay: ColorRect
 @export var environment_dust: ColorRect
 @export var blur: ColorRect
 @export var environment_shadows: MeshInstance3D
 
+@export_group("Sound")
+@export var thunder_sounds: Array[AudioStream]
+
 #environment nodes
 @onready var sun: DirectionalLight3D = $"../DirectionalLight3D"
 @onready var environment: WorldEnvironment = $"../WorldEnvironment"
+@onready var audio_player: AudioStreamPlayer3D = $AudioStreamPlayer3D
 
 var day_night_controller: DayNightController 
 var weather_controller: WeatherController
@@ -49,14 +52,15 @@ func _ready() -> void:
 			particles_fireflies,
 			particles_rain,
 			godray,			
-			fog_overlay, 
 			environment_dust,
 			blur,
 			environment_shadows,
 			sun,		
 			environment,
 			environment_config,
-			camera
+			camera,
+			audio_player,
+			thunder_sounds
 		)
 		weather_controller.name = "WeatherController"
 		add_child(weather_controller)