create weather controller and daynight controller

core/daynight/clouds_shadow.gdshader

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+shader_type spatial;
+render_mode unshaded, depth_test_disabled, cull_disabled;
+
+/*
+uniform sampler2D depth_texture : hint_depth_texture, repeat_disable, filter_nearest;
+uniform sampler2D noise_texture : repeat_enable, filter_linear;
+
+uniform float cloud_scale : hint_range(0.001, 0.2) = 0.05;
+uniform float cloud_speed : hint_range(0.0, 1.0) = 0.05;
+uniform vec2 direction = vec2(1.0, 0.2);
+uniform vec2 sun_angle = vec2(0.5, 0.5);
+
+group_uniforms Cloud_Shape;
+uniform float cloud_density : hint_range(0.0, 1.0) = 0.5;
+uniform float center_sharpness : hint_range(0.0, 0.99) = 0.7;
+
+group_uniforms Adjustment;
+uniform vec3 shadow_color : source_color = vec3(0.0, 0.0, 0.0);
+uniform float opacity_center : hint_range(0.0, 1.0) = 0.5;
+uniform float opacity_edge : hint_range(0.0, 1.0) = 0.2;
+
+group_uniforms Fade_Depth;
+uniform float fade_start : hint_range(10.0, 1000.0) = 150.0; 
+uniform float fade_end : hint_range(50.0, 2000.0) = 300.0;   
+
+group_uniforms Fade_Height;
+uniform float height_fade_start : hint_range(0.0, 500.0) = 10.0; // Inizia a svanire sopra i 10 metri
+uniform float height_fade_end : hint_range(0.0, 1000.0) = 50.0;  // Scompare del tutto a 50 metri di altezza
+
+void vertex() {
+	POSITION = vec4(VERTEX.xy, 1.0, 1.0);
+}
+
+void fragment() {
+	float depth = texture(depth_texture, SCREEN_UV).x;
+
+	if (depth >= 0.9999) {
+		ALPHA = 0.0; 
+	} else {
+		vec3 ndc = vec3(SCREEN_UV * 2.0 - 1.0, depth);
+		vec4 view_pos = INV_PROJECTION_MATRIX * vec4(ndc, 1.0);
+		view_pos /= view_pos.w;
+		vec4 world_pos = INV_VIEW_MATRIX * view_pos;
+
+		//Distance and height fade
+		float dist = length(view_pos.xyz);
+		float dist_fade = smoothstep(fade_end, fade_start, dist);
+		float height_fade = smoothstep(height_fade_end, height_fade_start, world_pos.y);
+
+		float final_fade = dist_fade * height_fade;
+
+		if (final_fade <= 0.001) {
+			ALPHA = 0.0;
+		} else {
+			vec2 projected_xz = world_pos.xz + (world_pos.y * sun_angle);
+			vec2 uv = projected_xz * cloud_scale;
+			uv += TIME * cloud_speed * vec2(-direction.x, direction.y);
+
+			float n = texture(noise_texture, uv).r;
+
+			if (n < (1.0 - cloud_density)) {
+				ALPHA = 0.0;
+			} else {
+				float internal_n = (n - (1.0 - cloud_density)) / cloud_density;
+				float is_center = step(center_sharpness, internal_n);
+
+				ALBEDO = shadow_color;
+
+				//shade color based on height
+				ALPHA = mix(opacity_edge, opacity_center, is_center) * final_fade;
+			}
+		}
+	}
+}
+*/