Hello,

Just for the record, here's a quick test using .obj format and rounded edges in Modo.
Tested with the 3 meshing options : triangle, quad-triangle, and ngones.

Ngones gives less trouble when using very draft mesh resolution (high angle value in Moi exporter).
This kind of shader is sensible to the underlying geometry ( no idea how it works :O) ), so giving a little bit of resolution in curvature (low mesh angle) helps a lot to avoid little artifacts.