BlendSrf creates much heavier surfaces between untrimmed edges than necessary to match the edges in most situations.
Loft in contrast creates surfaces with the minimum number of control points and spans required to match the edges. This discrepancy is independent of the continuity selected in
BlendSrf should use the same logic as Loft to create surfaces which are as light as possible while matching the untrimmed edges.
In the examples below
BlendSrf creates surfaces with around 60 spans in the transverse direction. Alternative blending surfaces were created by:
Loft between the edges
ChangeDegree the lofted surface in the U direction from degree 1 to degree 5. Retain the degree in the V direction
MatchSrf the lofted surface with the other surfaces.
The resulting surfaces have 7 or 10 control points. The continuity between surfaces is equal to the BlendSrf results.
BlendSrf needs to be updated to work like Loft in determining the number of control points needed.
In the mean time users can create light blending surfaces using
BlendSrfLoft.3dm (1.7 MB)