RetroGaming

Calling it a mod is a disservice, this is a customized GZDoom with a whole new renderer, plus the voxel sprites, plus lots of texture and map work to add reflections, lights, emissive textures, and more. It's really impressive work! Sunlight streams in through skylights, looks slightly hazy, colored lights look great, buttons and screen textures glow. They even made the spectre have predator-style cloaking! There's some cools settings too like being able to 50/50 split the screen with the default renderer so you can make your own "RTX enabled" memes and screenshots.

But yeah it definitely goes a little overboard. Turning off Bloom helps a lot, but I wish you could just turn it down. Even deactivated objects glow super bright, and things that light up when active all blow-out to pure white in the center. The map are way too dark generally though, to make the new lighting more dramatic but it's bad. Also the metablob blood effects are funny and cute (woah, liquid blood that splatters and flows!) but it looks kind of terrible and very silly.

Still there's some great surprises and gorgeous views! Definitely worth a spin!