@menno Would it be possible to add an automatic option for setting the U and V spans at the start, maybe again as an icon at the top?
That way, the command could automatically detect how many spans are needed based on my tolerance settings, making the process faster and more automatic.
Then, if needed, the user could still adjust the spans manually afterwards.
For example, in XNurbs I don’t actually choose the spans directly: the command sets itself automatically according to the quality level I want to achieve.
For example, here: if I use “Refine”, is it performing the kind of process I mean?
But if Refine is off and I want to reach, say, G1 continuity with cleaner/more organized spans, is there a way to do that automatically—without having to manually add or remove spans myself?

