I haven’t seen this before with Loft. Usually, if I loft two deg3/11 curves, I get a deg3/11 (deg1/2) surface. This time it’s creating a deg3/15 surface. It does the same in v5 and v6.
LoftChangeOfDegree.3dm (71.4 KB)
Is there a problem with the knots in the curves, and if so, how did that happen?