…if you thing they are good ideas:
-a floating, on viewport, movable, color selctior,like those circle based or better Photoshop kind… Often picking color with rmb is not enough, and going down to the edit buttons, too slow…
-not so important, but for models composed of many objects, like the wrap mode of dp3d, that is, it switches to be painting in the object you are at , now. Cool for when eyes are spheres apart frommodel, etc. Tho as an option, as is nice to be able as well to paint on an object without painting in th eother, sometimes, and is faster than making a mask.
-the problem of the shading…seems solid lighting is not very good for 3d painting…so I do in texture mode where it all appears without lighting or volume, flat. I overcome a bit this by making display properties of object display the wireframe over it, and set in custom theme a wireframe color close to what am drawing, in every area…
Excuse if these suggestions are too obvious…