I am guessing the Zbrush autoretopo algorithm will probably yield better results for this than the current 3D-Coat autoretopo algorithm.

It seems to do a much better job with a subdivision surface with nice edgeflow as opposed to an autoretopo mesh with bad (illogical) edgeflow. I think it should be a priority of your plug-in to get the best possible logical placement of nurbs curves after the conversion, instead of just random patches stitched together all over the body. Here are some precise differences between the two:Mesh mo. So, if we used edgeloop guides when performing automatic retopo in 3D-Coat, then I guess we would get a nicer resultant mesh after the nurbs conversion. Mesh Modeling and NURBS Modeling are two different techniques used in Rhino for creating 3D models.

It looks like the conversion to nurbs is dependent on the edgeflow of the polygonal mesh, am I right? For example, the rhino model in your demo would already have a nice curve around the tail/head/leg areas if there was an edgeloop there on the original polygonal mesh, correct? That way it would be easier to break the mesh up into nice parts or perform edits when it becomes a nurbs object.

Rhino subd to nurbs