One of the problems with modern hulls is that they often have soft chines that don't extend right down the hull. You see them particularly at the bow and stern. Blending these is difficult.

Hi Burrman:

Thank you for the info. I was thinking it would be a good idea to let a picture embebded in a 3dm file and.....MoI always go a lot of step ahead me :-)

Pilou:

Your video are very interesting, but...when you draw the upper curve of the bow, I think that could be better if you extend the curves of the deck or the upper area of the hull, and then you build the curve of bow on it.
Like that:

Thx!

Yes it was just for show some other tools ;)

You can also make a simple Blend : advantage you can regulate visually the intensity of the curvature with a cursor!
(input values inside the box dialog can be increase with big amplitude :)

Thank you!
It's a good technique, better than me. :-)