Thanks to all who responded. I think I have a better idea of what "nurbs" generally means. I still don't have any idea what the use of just generating a nurbs curve would be as implemented in vw 9. I have a free copy of Amapi which I think I will play with for now. In the end, my hope is to be able to generate real working templates for the relatively complex sheet metal I create as a sculptor. I know about "McNurbs" and their 3-d unwrapping plug in, "Touch 3-d" I have played with their demos but as I am not an engineering per se I seem to spin out on the learning curve pretty often.Thanks again. Have a good holiday.