I was playing for a while, everything was fine. At some point I had installed the official patch and the unofficial patch but I did not start experiencing problems immediately after this. Suddenly, in most of the outdoor environments, the floor texture is screwed up. It looks like the character is sagging into the ground:



I reinstalled but same problem.

Don't all shout at once! But seriously, don't worry about it, I fixed the problem. Had to reset something that the official patch did.