I heard that it is best to model the base wall, for example, a wood stud wall, and then model the plywood/shingles
adjacent to it as a separate wall. Is this a good approach? I can see the benefits as you can then stretch the skin to below the foundation wall or pull down shingles under a soffit.
My question is, if you do this, how can you make a window or door penetrate both layers of the wall?