@GridironGuy88 I'm not sure what you mean by unique shape exactly. Would you please add a screen capture of the room? Also, by ceiling prompt, do you mean the yellow, "build ceiling" outline above the room? I think that's what @jpkarlsen was referring to. I'm not much of a builder but I just tried playing around with some odd shaped rooms. I noticed the "build ceiling" prompt only shows if you're on the ceiling level.
Floor level:
Ceiling level:
Edit: I just remembered drawing a room in an existing build. My sims kept running "inside" during a thunderstorm. Then I noticed I could see into the room from the second floor and realized it didn't have a ceiling. I could not get the ceiling to build for that room. So if that's the problem you're having, I hope someone else knows how to fix that! :-)
I just noticed that any room on the second floor that I need a ceiling on, I just bring that room to the ground level and the ceiling automatically fills in. But as soon as I bring it back up to the second floor, it disappears again
