These buildings (I think that all over the map) that are on screenshots, they are open but inaccessible to players. The first one is at the beginning Elektrozavodsk. The second one is located on the upper square in Berezino. And the invisible texture is located at the entrance to the military tents in the upper Berezino. I have also noticed that after the use of the sewing kit(leather) on the player (instead of the bandage) will result in an imminent death(not tested multiple times). Everything happened yesterday(Stress test vol. 18)