We have added a new strategy called "Morphed spiral" intended for finishing of shallow areas.
When beta mode is enabled, you can create a morphed spiral operation from the right-click menu of the operation manager under New Operation -> 3D Milling -> Morphed Spiral.
The morphed spiral strategy generally works the same way as the existing spiral strategy. However, the morphed spiral strategy will generate the spiral from the selected boundary as opposed to the spiral strategy which will trim the generated passes to the machining boundary. This means that morphed spiral can be used for additional surfaces for which spiral is not appropriate. Note that nested boundaries are unsupported at the moment. This will be added a bit later.
You would often use scallop for machining free-form/organic surfaces but both the sharp corners and the linking transitions between the generated passes can result in visible marks (see picture "scallop").
The morphed spiral strategy will generally give a much smoother toolpath by avoiding the above issues (see picture "morphed_spiral"). Morphed spiral is not appropriate for steep areas in which case you would still use scallop or one of the other strategies.
René Fonseca
Software Architect