rebuildUVdoesntwork.3dm (248.3 KB)
RebuildUV doesn’t work in one direction, the longer edge.
Your Sweep2 surface has a weird naked edge. Reason for that is your bottom curve wasn’t closed, or in other words the end points were not identical.
RebuildUV works in both directions with the green surface.
rebuildUVworks.3dm (570.8 KB)
Thanks Martin! Good to know. It was external data, so I’m not too surprised it wasn’t optimum at all.
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