By Draft Angle

The ExtractMeshFacesByDraftAngle command separates mesh faces from the parent mesh object based on the angle of the faces to the view.

ExtractMeshFacesByDraftAngle can split a mesh object for molds or to look for undercut areas. In the example, the mesh faces were selected in the top view.

Command - line

Start angle from camera direction: Sets the starting angle from the direction of the viewport camera.

End angle from camera direction: Sets the ending angle from the direction of the viewport camera.

Border only: Makes polylines out of the edges of the selected meshes instead of extracting them from the parent mesh object.

Extract a copy: Makes a copy of the selected mesh faces rather than extracting them from the parent mesh object.