Sludge.tres

[gd_resource type="ShaderMaterial" load_steps=4 format=2]

[sub_resource type="Shader" id=5]
code = "shader_type canvas_item;

uniform vec2 scale;
uniform float y_zoom;
uniform vec4 water_color : hint_color;
uniform sampler2D noise;
uniform vec2 distortion_scale;
uniform float intensity;
uniform float speed;
uniform float wave_amplitude;
uniform float wave_speed;
uniform float wave_period;

void fragment() {
	float waves  = UV.y * scale.y + sin(UV.x * scale.x / wave_period - TIME * wave_speed) * cos(0.2 * UV.x * scale.x / wave_period + TIME - wave_speed) * wave_amplitude - wave_amplitude;
	
	float distortion = texture(noise, UV * scale * distortion_scale + TIME * speed).x;
	distortion -= 0.5;
	
	float uv_height = SCREEN_PIXEL_SIZE.y / TEXTURE_PIXEL_SIZE.y;
	vec2 reflected_screenuv = vec2(SCREEN_UV.x - distortion * intensity * y_zoom, SCREEN_UV.y + uv_height * UV.y * scale.y * y_zoom * 2.0);
	
	vec4 reflection = texture(SCREEN_TEXTURE, reflected_screenuv);
	COLOR.rgb = mix(reflection.rgb, water_color.rgb, water_color.a);
	COLOR.a = smoothstep(0.1, 0.13, waves);
}"

[sub_resource type="OpenSimplexNoise" id=7]

[sub_resource type="NoiseTexture" id=8]
seamless = true
noise = SubResource( 7 )

[resource]
shader = SubResource( 5 )
shader_param/scale = Vector2( 100, 1000 )
shader_param/y_zoom = 1.0
shader_param/water_color = Color( 0.0941176, 0.207843, 0.027451, 0.784314 )
shader_param/distortion_scale = Vector2( 0.535, 0.16 )
shader_param/intensity = 2.0
shader_param/speed = 2.0
shader_param/wave_amplitude = 1.463
shader_param/wave_speed = 3.53
shader_param/wave_period = 0.379
shader_param/noise = SubResource( 8 )