I wanted to add a room to the Brotherhood of Steel Base. To the "Hidden Valley Bunker L1" Interior Cell, to be specific.

So I opened the cell in the GECK and looked at it.

Half of the stuff you see in game is invisible. NPCs are apparently standing in free space, rooms are missing ...

Is this stuff stored elsewhere somehow? I have only limited experience with the Morrowind Construction Set and while it is similar to the GECK I never experience such a problem there.

HALP!