[gd_resource type="ShaderMaterial" load_steps=6 format=2]

[sub_resource type="Shader" id=1]
code = "shader_type canvas_item;

uniform sampler2D noise_sparse;
uniform sampler2D noise_fine;

const float noise_sparse_scale = 0.0007;
const float noise_fine_scale = 0.003;
const float warp_clouds_scale = 0.0003;
const vec2 scroll_dir = vec2(1,0);
const vec2 blink_scroll = vec2(50.0, 0);
const float PI = 3.1415;

render_mode unshaded;

void fragment() {
	float sparse = texture(noise_sparse, FRAGCOORD.xy*noise_sparse_scale).r;
	sparse = ((sparse * sparse) - 0.2) * 1.2;
	float fine = texture(noise_fine, FRAGCOORD.xy*noise_fine_scale).r;
	fine = fine - 0.6;
	if (fine > 0.) {
		fine = fine * 10.0;
	}
	if (fine > 0.3) {
		float fine_blink_fade = texture(noise_sparse, (FRAGCOORD.xy + blink_scroll*TIME)*noise_sparse_scale).r;
		fine = fine - ((fine_blink_fade * fine_blink_fade) - 0.2) * 1.2;
	}
	vec4 clouds = vec4(vec3(0.3, 0.5, 0.7) * sparse, 1.0);
	vec4 stars = vec4(fine);

	COLOR = clouds + stars;
}"

[sub_resource type="OpenSimplexNoise" id=2]
period = 2.0
persistence = 0.6
lacunarity = 3.0

[sub_resource type="NoiseTexture" id=3]
seamless = true
noise = SubResource( 2 )

[sub_resource type="OpenSimplexNoise" id=4]

[sub_resource type="NoiseTexture" id=5]
width = 1024
height = 1024
seamless = true
noise = SubResource( 4 )

[resource]
shader = SubResource( 1 )
shader_param/noise_sparse = SubResource( 5 )
shader_param/noise_fine = SubResource( 3 )