Odd visual bug when tabbing out and back in to game. Occurs in both fullscreen and windowed mode, as shown below. No idea what is it. If I save and reload the save then it all goes back to normal until I tab out again.
(http://puu.sh/r9Nnl/be5a37a152.jpg)
(http://puu.sh/r9Mge/4e6a4912ea.jpg)