Thanks for all your answers
Gijs-> it looks really good and i didn’t know there was this tool in Rhino, however, you end up with a mesh, and i would like to have a polysurface as i need to then cut it at some places and add some pattern via grasshopper.
vikthor-> I also tried this earlier but the control of the shape is much more difficult and the shape is a bit messier,
Lagom, Toshiaki, DavidCockey -> I tried rebuilding the crv and i end up with the following result, which is already something.
However the junction between more than two surface gets really messy, and the surfaces seems to have lots of “tension” even if they are in curvature between themselves.
I think it’s because of the initial curves i drew, but it’s difficult to understand which curve to draw to get the surface you want, is there a methodology or something to achive this curve finding? I know in alias you can modify the curve and the surface will update but the history in rhino doesn’t allow to do it in the same way.