Donno how well the title explains the problem, but while I was trying to find the name for this part of hall http://imageshack.us/photo/my-images/202/1waydoorway.png/ (3 way with a doorway to one direction)
I opened the vault21 in editor to see which one it was and half of the objects are invisible and I was unable to find it http://imageshack.us/photo/my-images/190/halfhidden.png/

So what could I do to see all the objects.

Ps. Also if someone knows the name for that piece of hall it would also help alot. I have only found a 4 way which had one of them as a doorway.