While looting nwaf i could not seem to enter buildings i would scroll wheel on them but would get no options to open door, I tried all the buildings with closed doors i.e. Barracks, and the new building near that and the civ hangers (blue doors). While in the head of trying to get the option to open the door subsequently my character glitched into the building and was stuck(i got out)
So a clipping issue may occur while waling into a will and trying to scroll wheel for options.