I’m a new user. I’ve just discovered NonmanifoldMerge. It seems to “join” polysurfaces that the Join command won’t (intersecting curve extrusions and revolutions). Clearly, I don’t understand what I’m doing here. (I think I know what a non-manifold edge is, but I don’t know why it’s important.)
Can anyone suggest, e.g., a tutorial that might help me sort out my confusions about Join versus NonmanifoldMerge? Thanks.