If I recall proquake requires the models to share a single texture. Meaning the arms and the gun have to be on the same texture.
Also what is the texture size? A simple 256x247 can cause it - but making it 256x256 will fix it.
Ah that could be the issue right there, some engines are strict on texture sizes. Generally the "safe" sizes always double:
8, 16, 32, 64, 128, 256, 512 ect
Try just resizing to 512x512 and see if that fixes it. Another thing to check - ensure the entire arm texture is actually on the texture in uv mapping. I've made a few mistakes where the uv mapping went outside the texture - appeared fine on the model but once ingame - it DESTROYED the look.
Since it's one texture and the gun appears fine. It appears to be a UV mapping issue on the arms. However try the 512x512 first as it could be just that simple issue.
im guessing its engine side problem. if it works everywhere else and you've tried all other solutions. see whats different in your engine code vs another engine?
well i assumed it was engine side, but why? what those models? the other models we have in are fine. The only thing that came to my mind was the medkit was a new IT_ITEM that i put in, but i did it correctly, in QC and in engine. So i thought maybe i did something wrong, so i replaced the super shotgun with spas, which used the IT_SUPER_SHOTGUN item slot in quake, still messes up.
Hmmm but what could possibly be happening in the engine for it to be selectively ruining those models? and ONLY the hand part of it? even though on a separate model we have those same hands