I"m having same issue, but since 1.7.2 i think. So far, i found a way to fix that (98% of the time). I change the graphic memory part in the options. I set to to low, then high again, so the screen goes black for a sec (texture quality also change to low so i put it back to high) It will solve the problem 4 times out of 5. If it doesn't and is too unplayable, i restart the game. Yesterday, that manip didn't work so i tried to set the AA to off, that didn't solve the bug but it was playable again (not covering 90% of my screen in Stary Sobor military tents. "weird" fact, this tips works for one friends of mine, but doesn't for twoo other friends... Have no idea why.. Edit: I think i already had this bug with no barbed wire around... or i didn't see them