For each floor of the building the software automatically creates a ceiling over the first exterior contour of connected rooms. In the example shown, the software proceeds as follows:
· Room 1 and Room 2 together form a contour, therefore an automatic ceiling is generated for them.
· Room 3 was input later and is not connected to the first contour, therefore it has no ceiling. So if a ceiling is required here, it must be inserted manually.
· The ceilings are visible in the 3D view with textures.
· In the bottom two 3D views the presence of a ceiling can be recognized by the top edge of the walls. The recesses in the top of the walls are caused by the ceiling which they support, and can be specified for each wall in its properties dialog.