Hello there everybody! I want to create a fully invisible room which can be placed entirely within the map's bounding brushes. The outside has to be fully visible from the inside and everything on the inside to be hidden from the outside. And, as you may imagine, when you are on the outside, all the entities and world brushes which are behind the room have to be visible through it, without seeing anything inside whatsoever. This is really giving me nightmares. :O Thanks you very much for any help in advance.