[OPEN] Disappearing Ceiling (Glass Roof)

@Waterwoman1987 I'm not seeing this issue on that lot in my game, but you mentioned that it was working okay for you in the beginning, which leaves a big question mark as to how/when it popped up.  Could you attempt to reproduce it again from scratch and tell me the exact steps that you took to get the problem to occur (i.e. just work with one or two rooms and try to keep it as simple as possible)?  Have you tried the "Build Ceiling" option (when you click on the room and then the yellow bar, it should be an option if the ceiling is missing - you can delete the ceiling and then replace it via this option)?  Another thing I can try is to test the build you have created in my game and see if it has the same issue.  If you'd like to do that, just upload it to the Gallery (you could call it something like "Test Missing Ceiling" and tag me here when it's available.