I have prepared two examples. The one on the left uses a roof tool to create the ceiling and roof. The one on the right uses a ceiling tool for the ceiling and a roof tool for the roof.
Very simple to create using either. Use the slope tool in the roof for the ceiling and place a slope arrow on each of the eight sides to the center walls, then add a flat ceiling in the middle.
Basically the same if using a ceiling tool, except you have to create each of the eight panels individually. Create one panel and add a slope arrow to the center walls, then mirror the one around the building interior.
Is this what you are trying to accomplish? If so, send the T-shirt
Mel Persin, AIA
Specializing in Autodesk ADT-Revit Implementation & Training
melarch@ameritech.net