Hello Andrei,
the NURBS modeling is good for me because I can create and change quickly the surfaces many times. This car is not a commercial car, I don't have blueprint to follow. I change idea many times during the creating process.

Probably I have to build me a "draft" nurbs model and then using it to create a second polygon model.

Many thanks :)
Francesco

Hello,

If you're running into continuity issues Blend and Fillet are the commands in MoI that you'd want to try using to clear those up. Automotive surfacing is challenging even with specific surfacing tools.

Hello Francesco,
throw an eye over, "keyword Surface Class A" here (I like this page!)
http://www.kodg-3d.com/en/tutorials/aliasvsrhino/45-class-a.html

and determined by the same designer from Russia, you can adapt some things in moi3d.
(is relevant only up 3 minute until minute 37, rest are not native commands, tut. only in russ-language)
https://www.youtube.com/watch?v=SXUf6MXDzA0
regards

many thanks :)