I don't see anything highly sculptural in the examples for Subd-nurbs. I am looking for something that could take 10 million quads (or more) and make a nurbs object out of it.

There are a few products out there that can convert polys to nurbs. Some have the intent to use the polys as a control to modify the nurbs object in ways that are not easily achieved in cad program, and so are not designed to handle large numbers of polys.

What I'd like to is a detailed scan of an object with a lot of surface detail with millions of polys, converted to a nurbs object, and the time required to convert it. I am assuming even now there is no single mouse click that will do it.

For my purpose, accuracy is not as important, so I would trade speed or ease of conversion for greater accuracy.