Hi Yenmonger, yeah probably Rhino's MeshToNurb command created that triangle that is half of a parallelogram. But there is nothing wrong with that.

I'm going to see if I can narrow down where in the inside/outside detection mechanism that things are going wrong and send this to the company that makes the geometry library so that it might get improved for v3.

- Michael

Hi Yenmonger, just a note on this - I was able to track down the bug in the geometry library that was making the inside/outside detection mechanism get confused for this case and I think that the fix is simple enough that I will include it for the v2 final.

- Michael

Neat, thanks!