John,
Why because NX-5 went G3?
Lurks,
We once tried to explain curves and surfaces to an engineer who thought he was going to learn CAD. He started out by picking apart the acronym NURBS for Non Uniform Rational B-surfaces. Then he went on to interrogate the B, which he discovered came from Pierre Bézier who came up with the mathematics of curves used to design automotive bodies. When he showed uo the following day with an expensive mathematical text book about Bézier curves, we knew it might take a while to get him to accept that somebody else already wrote the darned software. You'd do better to look into some training on what the system actually does and take in some reading about industrial design and the like if you want to tackle the surface studio side of things. Either way I think we could guide you better were you to frame your question in terms of what you're setting out to achieve, the way you put it was just to say advanced which could mean almost anything.
Best Regards
Hudson