surfaces near the edge
as soon as there is another surface close to the edge and is part of the fillet - but not part of the edge.
rhino s filletEdge Fails…
even if the the Surface is part of the
workaround of course is
to use_filletSrf
or - if possible (like here) build a single surface / split at tangents = no.
see also here
noFillet_close_to_edge.3dm (4.9 MB)