Quote - > Quote - It seems that this can only be handled by splitting the mesh along the sharp edges.

Actually, I have to correct myself here. Beveling might also work, possibly better.

If you mean the architecture-in-Lux problem, most Poser items with sharp edges are already split.
You just need to keep the splitting, and not welding what initially wasn't welded.
I think that would fix most if not all the problems. Now obviously, if beveling is easier, go for this, but I fear that it might create other problems.