Hi. Today when i was play , when i go out from cave, all textures turn to black. Especially ground. I forget to make screenshot from game, but i edit on paint similiar situation.

That problem was single, now is ok. I play now 1-2 hours without that issue ( artifacts ). But i want to know why that was happened? Something with GPU? But temps on game are 65-68 c max .
So hardware or game?

My pc:
Sabertooth Z77
I7 3770K 3.5
8gb ram
BQ Dark Power Pro 1000W
Msi Gtx 680 Twin Frozr ( temps on game are 65-68c max )
310 WHQL

Just look, something like that was happened: