In the new experimental update I'm getting some strange occlusion issues with the terrain. Hills and mountains near the edge of my field of view have a low polygon count, but fill in with detail when I turn and face them. See the image examples below.
It may be connected to using the "free look", since I've found that it mainly occurs on the periphery of my vision when I turn my head. EDIT: Also happens without "free look".
DayZ SWE 1-1 (Experimental/Unstable)