I very often design office buildings and I was very happy to see the ceiling plans in Revit. I just finished my first model and tried to render. Before rendering, I adjusted the ceiling grid to minimize the material loss, since I will possibly be the main contractor.
Everything looks good in plan view but look what happens when you render....
I was really disappointed to see this. I hope I'm doing something wrong.
Otherwise, you can imagine that modeling a ceiling of this kind would require much time and would create very large files and a model very difficult to render.