Glass shader

  • Known issues
    • It breaks if you use MSAA!
    • The glass is not rendered behind another glass

 

A variation of the shader based on the normal map

shader_type spatial;
render_mode blend_mix, depth_draw_opaque, diffuse_lambert, specular_schlick_ggx;

group_uniforms Parameters;
uniform vec4 tint_color : source_color = vec4(0.443137, 0.368627, 1.000000, 0.611765);
uniform vec4 backlight_color : source_color = vec4(0.5, 0.5, 0.5, 1.000000);
uniform float noise_strenght : hint_range(0, 0.05) = 0.005;
uniform float roughness : hint_range(0, 1) = 0;
group_uniforms Textures;
uniform sampler2D noise_texture : repeat_enable;
uniform sampler2D screen_texture : hint_screen_texture;

uniform sampler2D Normal : hint_normal;
uniform float normal_strenght : hint_range(-1, 1) = 0;

void fragment() {
	vec4 noise = texture(noise_texture, UV);
	vec3 noise_uv_effect = vec3(noise_strenght) / vec3(noise.rgb);
	
	vec4 _screen_texture = texture(screen_texture, vec2((vec3(SCREEN_UV, 0.0) + noise_uv_effect).rg)) * tint_color;
	
	vec2 specular = inversesqrt(vec2(tint_color.a)) * vec2(0.500000);
	
	vec4 normal = texture(Normal, UV);
	vec3 normal_map = vec3(normal.rgb) * vec3(normal_strenght);
	
	ALBEDO = vec3(_screen_texture.rgb);
	ROUGHNESS = roughness;
	SPECULAR = specular.x;
	NORMAL_MAP = normal_map;
	BACKLIGHT = vec3(backlight_color.rgb);
}

 

A noise-based shader variation

Shader code
shader_type spatial;
render_mode blend_mix, depth_draw_opaque, diffuse_lambert, specular_schlick_ggx;

group_uniforms Parameters;
uniform vec4 tint_color : source_color = vec4(0.443137, 0.368627, 1.000000, 0.611765);
uniform vec4 backlight_color : source_color = vec4(0.5, 0.5, 0.5, 1.000000);
uniform float noise_strenght : hint_range(0, 0.05) = 0.005;
uniform float roughness : hint_range(0, 1) = 0;
group_uniforms Textures;
uniform sampler2D noise_texture : repeat_enable;
uniform sampler2D screen_texture : hint_screen_texture;

uniform sampler2D Normal : hint_normal;
uniform float normal_strenght : hint_range(-1, 1) = 0;

void fragment() {
	vec4 noise = texture(noise_texture, UV);
	vec3 noise_uv_effect = vec3(noise_strenght) / vec3(noise.rgb);
	
	vec4 _screen_texture = texture(screen_texture, vec2((vec3(SCREEN_UV, 0.0) + noise_uv_effect).rg)) * tint_color;
	
	vec2 specular = inversesqrt(vec2(tint_color.a)) * vec2(0.500000);
	
	vec4 normal = texture(Normal, UV);
	vec3 normal_map = vec3(normal.rgb) * vec3(normal_strenght);
	
	ALBEDO = vec3(_screen_texture.rgb);
	ROUGHNESS = roughness;
	SPECULAR = specular.x;
	NORMAL_MAP = normal_map;
	BACKLIGHT = vec3(backlight_color.rgb);
}
Tags
4.x
The shader code and all code snippets in this post are under MIT license and can be used freely. Images and videos, and assets depicted in those, do not fall under this license. For more info, see our License terms.

Related shaders

Glass Square Effect Shader

Procedural Stained-Glass Shader

Frosted glass

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