Hello we have a mesh generated from 3D scanning of a physical model. I am trying to use the curves highlighted in yellow and extruding them to split the mesh using MESHSPLIT but it is not working.
Essentially we need individual rocks as shown in the 3d scan model
Rhino 3D Model Scan.3dm (17.2 MB)
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Hi jon,
It works fine for me - I used the extrusion of the crv to split the mesh
is this what you are after?
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I think what would be desired is to segregate the rock geometry right at the inflection points where the compound curvatures change from high curvature to low curvature and vice versa.
Unfortunately the reverse engineering industry is monopolized by a small handful of software companies.
What would be great 
, is if the user could drag the points of a curve/polyline along the mesh/“surface” …
Hi @wxcchuck.
I take it you did this in Rhino 7 (or 8)? It works in Rhino 7. However the original file came from Rhino 6 where the split fails.
@jon9, McNeel beefed up the mesh handling for R7. You might want to upgrade if your goal is to produce a Rhino 3dm file. Alternatively you could bring the mesh into a dedicated mesh editor.
Regards
Jeremy
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Mesh split has been tuned up even more in v8.
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did you change the extrusion of the curve to mesh first before splitting? it is not working for me
you can split a mesh with a nurbs object, BUT you have to use the mesh split, not the regular nurbs split tool.
i figured what was the issue. I was using rhiino 6 and meshplit was not working with rhino 7 it is working. thanks so much for this help