Hi Dan,

> Keyshot seems to give better results importing obj files
> than 3dm files - spheres appear distorted in the latter but
> are fine using obj files.

Sounds like probably a bug in either Keyshot's 3DM importer or their NURBS meshing mechanism.

Spheres happen to use a particular feature of NURBS that are called "weights" that are not always used for just a general surface that is not an exact conic.

Probably the Keyshot importer is not handling surfaces with weights set on them correctly. If that's the case then you may find that cylinders have a similar problem because they use weights as well.

If you send them a bug report on that one (with a sample sphere file for them to reproduce the problem), that's probably something that is easier for them to correct than the n-gon processing would be.


But you're going to be better off using MoI to produce the meshing instead anyway. When you export to an OBJ file, you're using MoI to do the meshing rather than relying on the NURBS-to-mesh conversion in Keyshot.


- Michael