Ah ok, now i found it :). I already attached the rar, let me know if you need to know anything else.
T

I was playing yesterday in the stable and had the same issue, played like 20 min and then.... Im downloading experimental now with the new patch i will tell you if i still have the issue and then upload that.
Edit: I played yesterday on experimental and the situation is the same. First half hour i played like always but then i start to see white texture everywhere, then the screen freeze and i get a blackscreen when the only solution is to close the game.

Also i cant find that file i only have my profile and thats it