Hi Ed, yeah MoI does use a completely different geometry library than Rhino. Even though MoI uses the same 3DM file format, that's just for storing the model on disk, not for calculations that happen at model time.

So the only part that is the same between MoI and Rhino is the 3DM file reading/writing library (which is called OpenNURBS), the actual modeling kernels are different.

Usually though I would not think that projection would be a problem in Rhino. It may be something that they can fix up if you can send them an example that does not work.

But anyway, I'm glad that MoI was able to help you complete your task!

- Michael