I’m trying to loft 4 circle shape curves and bended rectangles to create funnel shaped soffit. I wasn’t able to loft last circle with soffit line, instead I made a patch but it’s not smooth as I’m looking since those are 2 different object.
You should try to get your funnel shape to work as a single mesh, perhaps via a relaxation method using Kangaroo (many examples out there - or look at the kangaroo examples for grid shells).
One here
Another one here
One without kangaroo here
I bet these are not even the best ones.
Anyway, your result should be fairly close to the images you provide above as example/goal. Once you have that, you should be able to convert your mesh to clean quads and/or SubD. However conversion might not be necessary at all, for you can still get those trusses going by intersecting or projecting your lines on the mesh.
Thank you for the reference examples. They don’t need to be NURBS. I’m OK with any form as long as it’s doing what I’m thinking to have. I’ve tried the first example. It does work but doesn’t follow middle curves to follow it. It’s lofting only the top and bottom curves. It’s smooth indeed but I need those funnels to follow mid circles as well.
When I add those into selection "solver’ creates a weird shape…
What it does at the moment is, connecting 1 and 4 with strength value and ignoring 2, 3 and possible 5. Having other ‘mid curves’ like 2 3 5 would give more control on the look and position of the funnel, or sweep 2 rail with a curve that can be controlled by radius…
I also tried to add central edge and got more or less the same result as you did
I know we wish for this to be sexier - I’m sure it’s fixable via some tween curves or something that makes a smoother transition, maybe add smoothing or soapfilm to kangaroo part - or use what Riccardo did for his example combined with this.