When you create a Top/Orbit view of a building with a ceiling, the ceiling should be hidden to make the view show the interior of the building.
To hide the ceiling in a view:
- Go to the Objects tab.
- Select the ceiling object in the scene or from the list.
- Check the box next to Custom hide in views.
- Select the name of your Top view (if you don't have a Top view you need to create it first).