Experimental 3D Texturing Concept, Part 3 Show more
I'd imagine this would inflate the unwrap time, though. Would be hard to keep the stroke history from getting long. I'd think you'd want to do some kind of layer flattening operation? But that'd only work for stretches where the user was just painting and not changing the mesh structure.
Also, since you're throwing away and re-drawing the texture every unwrap it'd move texels. So it'd be noticeable when the screen-space texel size is large.