For some erason multiple models and stuff across the map are turning into either a bright glowing orange, or a flat featureless brown texture. Even the grenade in my hand is doing the same. This happened to me before on another map (INFRA sawmill by Loadingue) but I thought it was just because that map is from INFRA

Does anybody know what this is and how to fix it? I've switched gmod versions from Chromium to regular, I've disabled all my addons except pac3, playermodel, and this map, and still the same thing keeps happening.