this one for the allegorithmic substance painter sketchfab competition. original model here - https://sketchfab.com/models/hliAt7xc6YU2XjXh5G4lzmQwFmR
god bless quad chamfer, god bless substance painter. how easy do you want ur 3d'ing bro?
can confirm, subpainter export to sketchfab is osm. works like a charm.
interestingly, the same fbx i imported to painter when uploaded to sketchfab, suffers from flipped normals on mirrored uvs. spooky.