hello,
on terminal, i found a certain place where the graphics glitches, wall disappear etc, here are the images :
http://steamcommunity.com/sharedfiles/filedetails/?id=462338785
when you go to this location : http://steamcommunity.com/sharedfiles/filedetails/?id=462338656
then close the left wall you can see this : http://steamcommunity.com/sharedfiles/filedetails/?id=462338628
another problem : When you throw a medpack or ammo pack near a MG and use the MG you will get stuck and unable to exit or fire the MG.