I’m getting inconsistent results with BlendSrf on two very similar, very simple surfaces. Both surfaces were swept using identical rails and cross sections. Both surfaces had an extra edge split (6:00, mid-snap on bottom edge of open srf) to make it possible to blend one side of the polysrf to the other. One blend works, one doesn’t.
What is the difference? Why does one work and the other not?
BlendSrf.3dm (201.3 KB)