Hi there,
right now we have the options to paint straight lines via the SHIFT key. Distance is also an option (but not always a good one).
After painting stitches on a more difficult surface approximately 50 times and my eyes are already hurting i wish there was an option to create a 2D Spline in the 3D view. it should be adjustable and enable the user to have all time in the world to adjust it and when happy, paint the spline-line.
Basically an curvy alternative to the SHIFT-line.
(I'm sure my eyes are bleeding as i'm writing this after stitching long difficult lines so many times to get it right)