update cloud density when is rainy or snowy

core/environment_config.gd

@@ -98,6 +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")
@@ -106,6 +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")