Hi All!
With the introduction of PBR materials (and Substance Painter, for those of you lucky enough to have access to it), I think it would be really nice to have an additional option in the custom render mesh: Weld angle. When using materials with displacement, unwelded edges will see the individual surfaces of polysurfaces overlap/offset. If there was an option to specify a custom weld angle for the custom render mesh, this could be avoided (sometimes, at least). Unwelded mesh on the left, welded on the right.
TIA, Jakob