Blendsrf, sweep2, patch - none of them create a surface

Rhino
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1

Hello

I wonder if there’s another way to add a ceiling/roof to this ice cave drawing? I’ve used spline to create shapes, loft to merge it. Then I used points on and modified the waves as I needed, but that resulted in the top line changing shape. Now, the cut off part of the ceiling doesn’t fit the bottom part exactly.
I tried to networksrf, and matchsrf, ant patch, as well as sweep1 and 2, but it doesn’t create a coherent surface. Is there something else Im not aware off?

Please help as anotherwise I need to redraw it all from scratch :cold_face: :crazy_face: :woozy_face:

Also, while Im here - is there a way to blend two corners that aren’t polysurfaces - where my icecave meets the tunnel - I’d like to soften the edges, but blendedg or srf doesn’t do it. Im sure I’ve messed this model up as I am a learn as you go Rhino user and often don’t make my 3ds in a correct way.

Thank you!

Screenshot 2023-09-13 at 15.25.21
Screenshot 2023-09-13 at 15.25.211194×712 57.7 KB

2

You might want to extract the edge and check for self intersections. If there are none, it’s likely not planar. You can extend the surface and trim it with a plane and then run the cap command.

If you cannot solve the problem, post a Rhino file with the relevant geometry and possibly the curves used to create the surface(s).

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