I’m trying to create a curve where the outer curve swoops down to the inner curve.
But when I use the surface from 2,3,4 edge crvs or surface from network of crvs
it always curves down into the (below)right crv, doesn’t match it, even patching it
How do I create the surface?
Are you trying to create a curve or a surface?
Upload a .3dm file with the geometry. You can drag the file to where you type a post, or click the vertical arrow icon above where you type a post.
Sorry I’m trying to create a surface
forum.3dm (72.7 KB)
It’s not very clear what your design intent is when I look in that file. But what I can tell is if those curves need to be part of a surface, you’ll need to model more precisely, and think about where you want to have G0, G1, G2 continuity.
You can’t build a proper NURBS surface when the ends are collinear, but you can use collinear curves to trim a surface. Maybe like in the quick ‘n’ dirty example below. Hard to say what you really want to achieve without more information.
your biggest enemy is this corner, you have 2 tangencies that are crossing wild. the other side is not very well attached but is less of an issue
no tool in the universe would make this a smooth transition if you dont have the curves meet properly.
besides all that, see to it that the curves attach at the corners properly, there are many parts that looks so neglected that it looks like you had a party and are doing something fun before you go and have a nap 
