I'm sure this is just a newbie problem, but I did a search and couldn't find an answer - probably not using the right terms.
I've laid out a pretty simple floorplan, and defined the rooms. However, in the 3D view, there are black triangles coming from one corner of the floorplan (probably not coincidentally, at 0,0 where I started). The walls are all rectangular and the same height. Also, when I try to add furniture, it shows up in the 2D plan, but not 3D. Any pointers welcome!
KB
