In terms of figure, this is pretty good. But the lineart leaves much to be desired. Try setting the 'antialias' checkbox in Lascaux on, that will help some. Try using different thicknesses of line as well. The shading here is not really shading at all; all it does is make the lines look blurry, so I actually prefer version 2 over 3. If you're going to shade something, pick out a direction for the light to be coming from, and use the shading to indicate it.