Edit Mesh > Split Mesh with Projected Curve

 
 
 

Splits or splits and detaches edges on a polygon surface.

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Split mesh with Projected Curve >

Split
Cuts the surface of a polygon. The face of a polygon is split, but the components are still connected and there is only one set of vertices.
Split and detach edges
Separates the polygon along the edges that were split. The components of the polygon are detached and there are two or more sets of vertices.