The silhouette trick worked great.
This new development sounds interesting.

I am a technical illustrator who works with 3D models. I have some software which can take a STEP or IGES file and convert to a thick/thin line illustration in ai or eps format. However it costs $10,000 (isodraw) - if MOI could do even half of what this does youre onto a winner in my book! However in isodraw the ellipses come out as bezier curves with 4 points which very easy to handle.

Is this your development work or does it come via external code libraries which you licence?

Matt J