Wirecut through a solid, in the shape of a flanged plate, will force the cut object to split at its creases or tangents. If I use boolen difference to cut through the flanged plate, it does not force a split. I have to disable creasesplitting prior to running any wirecut commands to preserve the part that I want. Then re-enable creasesplitting after the wirecut command. It happens with an open or closed cutting curve.
This has been an issue since rhino 8 was released. Maybe I can give it attention again.
Reproduce: extrude an L-shaped profile (flange + web). The inside and outside corners where they meet are tangent arcs — smooth edges, not creases. WireCut that solid.
Expected: tangent arcs stay unsplit.
Actual: the result is split along both tangent arcs.
Workaround: I disable crease splitting prior to wirecut to avoid the unwanted splits.
There was a time in the past where wirecut did not automatically split like this. If the current behavior is as intended then that’s fine, I suspected it wasn’t.
