How to turn normal curve to sculpting paint curve?

Hi everyone. In sculpting stroke method, the curve that can be chosen is only new paint curve. Is that a way to use normal curve like BerzierCurve or NurbsPath to sculpt? Or turn them to paint curve?

Anyone have a clue, please?

There is no tool by default for that. And I think there is no addon able to do it.

Paint curves are 2D Curves relative to view. Curve objects are 3D objects.

That would be useful to handle such conversion.
Unfortunately, Sculpt/Paint module is evolving slowly and has other priorities (big projects about brushes management, Dyntopo Settings per brush, Multiresolution modifier fixes, Roll mapping support…)

Thank you for the explanation.