Hi PaQ,

> In a moment I will do an export of your filleted cube out of
> Rhino for you test with as well.

Actually, I won't do that, because actually Rhino doesn't have any way to write a welded OBJ file, it can only write the structure as when MoI has welding disabled, which I think you said produces a pretty different result.

For welding problems, let's focus on the cube example. That example is pretty clear - cube from MoI = problem, cube from Modo = same problem...

Probably a different case for non-welded would be good, a simple shape that is supposed to be smooth but gets creases in Octane. What would be work for that, maybe just a cylinder in 4 segments?

- Michael