Putting a roof on a map

So I made this indoor map and now I want to have a roof on it somehow.. I already checked for suitable doodads to mess with but there's nothing really of use (yeah I could put floating table doodads all over the map but that's.. a bit too much work :)).
the camera is right behind the main character and it looks so.. open. Any tips to make it look more indoor?

Maby... Make the walls taller? Or do as you said make flying table doodads

This is a dumb comment, but you COULD make the flying table doodad like scaled up 9000 times so you only need one...

I really am not sure on this problem...

if you placed a big doodad, i dont think you would be able to walk under it

if the whole level is indoors -- there's no reason to have a roof :P On the other hand, you could give a unit with a large scaling value the roof doodad model that you spoke of, make it a flying unit, and then setup triggers to make it translucent when the player walks under it.

Then make a flying unit with the table model with no collision through a trigger!

thanx for the inventive suggestions all.
The roof doesn't have to be transculent cos the camera view is behind the main character, so you're looking into a corridor. Right now the roof is just.. open black. Can't I do something with set sky? Can I somehow make a flat wooden sky? :D