Improved frosted glass
Based on miskatonicstudio’s frosted glass shader (and updated for Godot 4). The difference is that this one makes use of the depth texture to prevent the distortion from increasing with distance. This can make the effect more believable, especially in cases where the distortion is subtle.
(this also has a mild performance impact)
Shader code
shader_type spatial;
render_mode shadows_disabled;
uniform float distortion_size = 0.4;
uniform sampler2D glass;
uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
uniform sampler2D depth_texture : source_color, hint_depth_texture;
void fragment() {
vec2 d = texture(glass, UV).xy - vec2(0.5);
ALBEDO = texture(SCREEN_TEXTURE, SCREEN_UV + d * sqrt(texture(depth_texture, UV).r) * distortion_size).rgb * 0.9 + vec3(0.1);
ALPHA = 0.99;
}
