I made a new wall for my bathroom because I didnt like the existing wall pattern and in the country house the whole thing has chair rails that are 3d, they stick thru your signs so the wall was easier to make...i then added a doorway prop to the wall to remind me where the door was...put a sign on the wall to cover the whole thing and then put a sign in the doorway for the door itself, thus giving it a nice 3-d effect.
Because most of the props arent tile-able, when you try to cut around a doorway with multiple signs, it does change the wallpaper. unless you use a solid color. I got good results on a wall I built in my house to seperate my kitchen from the rest of the room, used a solid color on multiple walls and walldoorways and got a satisfactory result.
heres the wall i built:


and heres a pic of the door i mentioned above from both sides however in that last shot i was trying to show more of the bath then the actual door.

