Hi All,   A square shadow in the middle of a room's ceiling is a known issue that is associated with the default interior light.  If you add an actual light source (fixture or Added Light), it should go away. I know that our software developers are aware of this problem but make sure they've seen this thread, too.   The squares on the walls and floors, however, are another matter.  We haven't seen those before, so if you have a plan in which they are a problem, PLEASE send th