/vr/ - Retro Games

Here's what I have so far for the GZDoom retro shader.

http://pastebin.com/cUu5c4Zn

Open up GZDoom.pk3 and go to shaders/glsl/lensdistortion.fp and delete the contents of it, replace it with the pastebin. Might not look right with non-16:9 ratios, if so then you'll have to adjust the shader's dimensions.

Other things to set, under Display Options -> OpenGL Options -> Preferences, set Sector Light Mode to Software and turn on Tonemap and set it to Uncharted 2. Also turn on Lens Distortion since that's replaced with the retro shader. Under Display Options you might want to lower the Gamma Correction. I've noticed that a lot of dark areas turn to grey because I'm not using the actual Doom palette or colormap but this combination of gamma and tonemapping gives it enough contrast and looks a bit saturated like how I remember my old 15" CRT.

It's not perfect, but it's crunchy.