I am working on a complex model and am having problems with what seems to be overlapping/hidden surfaces.
I have a wall of a house. The wall is made up of just one shape (a planar rectangle). When I select this shape only part of the shape is selected. The other part, with no line delineating a different shape, is not highlighted.
I have experienced this in the past. It is a pain. What is it and how do I fix it?