Green arrows show symmetry plane.
Orange arrows show seam after ToNurbs.
Yes, I know about SrfSeam, but I don’t think this should happen in the first place.
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this is simply a product of the tonurbs process.
if you need a center seam- make the model in halves, then convert the halves.
I don’t think you understand.
The model IS a halve. I’m using Rhino’s own SubD symmetry command to make it whole.
That’s a subcase of this issue: RH-64292 toNurbs output from symmetric SubD (created with reflect) is not symmetrical. I’ll add your vote there. (The issue has a private 3dm linked to it so need to stay private, but we are aware of the issue and it is being worked on)
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