I load up Garry's Mod, and whatever map I go on the whole world, including be and the guns, is pink and black chequerboard.(except for some models)
e.g:
the reason why I thought of that is because I was watching The IT crowd:
"Hello IT[no chance for caller to speak] Have you tried turning it off 'n' on again?"
yes and no unfortunatley but it works now. What I got when I verifeied was a Half chequerboard world, where the grass and sky were alright, but hats it, and nothing happend on the second verify.