MarkSurfaceDiscontinuities
, which looks for internal discontinuities of surface.
I’m very grateful to pascal for this great plugin.
The image below is the result when I run
_MarkSurfaceDiscontinuities _Details=Yes _MarkAllFullyMultipleKnots=Yes _KnotColor=255,0,0 _G0Color=0,0,255 _G1Color=255,0,255 _Samples=32
.