I brought some CAD geometry into 3ds Max 2017. I’m attaching objects that share the same materials (optimizing for use in a game engine). The geometry has smoothing groups and looks pretty good but when I try to attach with either Edit Poly or Edit Mesh, the smoothing groups are lost and the geometry looks like crap.
I poked around and found this thread:
and this one:
Which basically says “It is Vertex Normals, not smoothing groups/face normals. Edit Poly will always discard them… Any topology changes or topology changing modifiers will discard them.”
I added Edit Normals modifier and that eliminated them. I tried the Collapse utility and that eliminated them as well (though, I’ve never used that before so it’s quite possible I did it wrong.
Those threads are from 2011 and 2012 so I’m wondering if this issue has been solved. Is there a way to preserve smoothing group on CAD geometry that has Vertex Normals?
Thanks in advance.