/vr/ - Retro Games

>>6824410
If you haven't turned off dynamic lighting yet, try that and see how performance goes. Besides that, ZDoom is an option if the mod is compatible, same with older versions of GZDoom that are compatible with the mod you wanna run. Usually something from around when the mod released works best. There's also GZDoom Vintage, which split off from the main build when it dropped support for OpenGL 2.x.

Good luck anon. GZ is a fucking rabbit hole and people often wind up with multiple versions just to run specific mods. I went through four alone before finding one that played nice with Pirate Doom.
If you're not playing something that specifically requires the engine, use pretty much anything else.