Nearly everything purple/black and error in STALKER.

[Cathedron]

http://i.imgur.com/ZPYwMKX.jpg

I downloaded the content packs but they only fixed the player models and that's it.

Any fixes for this?

 

[Gangleider]

http://taconbanana.com/files/snowfix.rar
http://taconbanana.com/files/srp_darkdolina_v3.rar

Try the above two files. The second is a map, but its content is used pretty much everywhere.