Ceilings? (Solved)

[Alexander]

Weird, in the editor the models show up correctly? It seems some kind of material error.

Try a thing, put a piace of ceiling on the floor, and see if it show black, if yes then there is something wrong with the material. Maybe corrupted files, if you have the steam version try to check the cache of the game.

Yeah I tried placing the concave piece on the floor... It shows up just fine in the editor, but it doesn't exist when I fire up the game. I can even delete all the ceiling pieces from someone elses map, but it will still be there when I launch the game.
Everything else seems to be just fine.

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This doesn't have anything to do with running in dev mode does it?