Quake3World

This problem, is really bugging the hell out of me. It doesn't happen in all maps, only some, and I'm not knowing why this is occuring really.
Anyone possibly be able to provide help?

Are you playing a mod or VQ3? I'm asking because I've only seen this happen in buggy mods.

Its a custom level map, that appears to work for everyone but me. As well, im having other maps missing small spots, like textures of vehicals.

most likely another map conflicting with that map, and fucking shit up. Check for other maps that might be conflicting (move all custom stuff out of the baseq3 folder and see if that solves)