Hardware Colormap proof of concept
Posted: Mon Jan 24, 2022 6:05 pm
This shader is basically a hack that feeds 8-bit texture data directly to a post-process shader.
Included is a .png of Doom's colormap. (but any colormap exported from Slade should work, simply replace textures/colormap.png from any game)
This shader is far from perfect, and a lot of things break it. In order to look even a little bit right, the following things will need to be disabled:
- Menu Dim
- Anisotropic Filtering (textures)
- Texture filtering at all (must be set to none)
- Transparency (except for shadows)
- Screen Flashes
- Dynamic Lights
- Pretty much anything that does any sort of color mixing whatsoever - unless that color mixing is strictly black
This is a proof of concept. All it shows is that GZDoom is potentially capable of something - it does not actually work 100% properly. Pretty much anything will break it. If it works for you, you're a lucky one.