My Materials Are Fucked Up

** <— Screenshots

I have no idea how this happened/why. The map in the screenshots is rp_downtown_v4c_v2. I also loaded up cs_assault and the materials are also see-through on there. Thanks for any help in advance.**

I have tried verifying the game caches of CSS and Gmod, and restarting my pc, and restarting gmod.

did you got an css material wallhack inside your addons, materials (garrysmod) or in you local css installation?
because that’s how it looks