This is a multi-function postprocess shader for GZDoom 3.2.5+ that supports various effects which can be combined together. They are mostly based on a 3d simplex (perlin) noise function such as texture distortion and tint, in addition to some trippy effects like lerping the hue, saturation, or value.
Texture distortion, subtraction, and tint:
HSV shift animation:
The root of this repo can be loaded as a -file by GZDoom, or you can use a pk3 from the releases section.
Shader uniforms can be controlled from ZScript or using CVars. Here are the available CVars for tweaking the uniforms:
| CVar | Default | Description |
|---|---|---|
timescale |
0.005 |
how quickly to run the noise permutations |
scale |
1 |
uniform scale (zoom) of 2d noise plane |
distortion |
0.05 |
How much to distort texture. 0 means no distorition. Values higher than about 0.3 will make the game unplayable but look cool... |
subtractive |
0.25 |
amount of color to subtract (darken) the screen by based on noise function, 0 means no subtraction. |
animh |
true |
Animate hue? |
anims |
true |
Animate saturation? |
animv |
true |
Animate value? |
tintr |
0 |
Red channel additive tint |
tintg |
0 |
Green channel additive tint |
tintb |
0 |
Blue channel additive tint |