Hi Karsten, I've thought before about trying to make a curve shaping tool that worked sort of like an airbrush where you could apply multiple airbrush strokes and then I'd work on fitting a curve through the densest region of it. Then maybe you could alter it by erasing the edges of some airbrush areas or applying more airbrush strokes on top of other areas.

Unfortunately it will require a lot of very time consuming experimental work to make that happen so I'm not likely to be able to get to it very soon.

Right now if you want more control than what the current sketch can do, I'd recommend drawing with control points instead.

- Michael