the current curve tool in sculpt has the issue that is is not 3D based.
ideally you want to project curves onto a mesh so you can sculpt brush along them
Yah 3d curves would be a lot more useful than 2d ones. Maybe an option to draw a 2d curve and project it onto the mesh as well? It would also be nice to have an option to fill the interior of the curve while masking instead of just tracing the outside.
Probably not exactly what you want, but in the mean time, this might help…
Perhaps try it with “Surface (3D view only) New (grease pencil) strokes are drawn in 3D-space, with their position projected onto the first visible surface.”
I would tried like Cancer said, and even with Gpencil converted into bezier i can’t get it working and i got this error:
Traceback (most recent call last):
File “C:\Users\Raphael\AppData\Roaming\Blender Foundation\Blender\2.75\scripts\addons\sculpt_stroke_on_grease_pencil.py”, line 112, in execute
brush_stroke(stroke=stroke)
File “C:\Program Files\Blender Foundation\Blender\2.75\scripts\modules\bpy\ops.py”, line 189, in call
ret = op_call(self.idname_py(), None, kw)
TypeError: Converting py args to operator properties: SCULPT_OT_brush_stroke.stroke error converting a member of a collection from a dicts into an RNA collection, failed with: TypeError: Converting a python list to an RNA collection: keyword “size” missing