pls pls

Do you mean “isocurves” when you say “knot lines”?
The file you attached does not match your illustration. The surface in yellow in your illustration is different in the file.
Hello - I am not clear on what you want - do you want the surface to align to the lines that you have drawn or do you want the surface to match the isocurve structure of the existing surface? What are you trying to accomplish, either way, in the end?
@davidcockey will be the one to say but I do not like how your curves are hitting the bow line here - it will make it hard, I think, to make a clean finish at the bow - I’d try to keep those curves ‘fat’ and convex.
-Pascal
thanks very much! 
Thank you for your help, please help me how this surface is created! I don’t know what to do
help me.3dm (1.4 MB)I only know how to use rhino! sorry

it only occurs to me that you should section the curve again.
someone with more experience in the marine industry can guide you better
help me_.3dm (727.4 KB)






