Well, an easy way to go about it is to make the shading layer at 50% opacity, then use a soft brush to paint in the shadow areas with black. (since the layer is at 50% opacity, it will darken whatever you color over). Thats the technique I used back when I was getting started.

Though primitive, its quite effective. http://groups.msn.com/purrhead/shawn...oto&PhotoID=51

All the lighting in that pic was made using that technique. (you can make a lighting or highlighting layer with the same technique).

Anyways, I'm impressed by your advancement in your coloring skillz .

Nice stuff, and that is a very acurate potrayal of Magica Dispell. Ah the classics. ... Dang its kinda crazy how there was actually a Duck Tales movie out in theatres, back in the early 90's. I just remembered that.... I'm old O.O;