look at pic. since i bought this game years ago, i have not been able to play it. I have had 3 completely different systems, and I always get this texture corruption. ive got the latest version patched. nothing seems to fix it.
Have you tried patching it? I seem to remember something similar happening when I first bought it, but I dont remember how I fixed it....
What settings have you been trying to run the game in? Maybe try re-installing it....? What drivers have you tried? - I have a machine with an ATI card and a Machine with an Nvidia card, I might install it on them to see if I can reproduce the problem...... EDIT** - I can only find disk 2, looks like I might not be able to do that for ya.
I have the game and I have never seen that happen before try reinstalling as adair_fettc said, then patch it again but try the 1.3 first and see if that work and then the 1.4 one and see if it work but re-download the patches again to make sure there not corrupted.
Most likely a driver issue. Make sure that you use Driver Cleaner and try different video drivers to see what works best.
Might be a long shot, but have you tried replacing the kyle and (Forget her name) chicks textures? Or does it happen with more than just those models? If you check out jk2files.com (Think that's it, google it if it isn't) and check around you're more likely to find a fix.