When you add Rooms, you can prevent walls facing the viewer (facing walls) from obscuring the floor of the room. There are four options:
Draw facing walls: no facing walls are removed.
Facing walls are wire frame: the facing walls are drawn with an outline only, as if they were transparent.
Facing walls are lower: the facing walls are 2’ high.
No facing walls: the facing walls are not drawn at all.
Currently, circular rooms are always drawn with facing walls.