Hi OSTexo - the other thing I seem to remember is that it didn't handle the situation of 2 faces sharing a point location in common but having unique vertex normals for each one. You'll get a mesh like that if you have the "Weld vertices along edges" option set when you are exporting from MoI.

So I'd recommend turning welding off and set "Output: Quads & Triangles" when exporting to Octane and see if that makes any difference.

- Michael