In Step 11, I separated out the line work from the background, plunked it down on a new layer, and locked that layer's transparency.
16. Now, I can paint all over that layer, and it will only affect the lines that are already there. This is pretty simple drawing, so I didn't do much: just a gradation from a lighter brown to a nearly-black brown. My recent Medusa post involves a little more coloring done on the line layer. One could push the possibilities of colored line a lot further, but I tend you use it sparingly.
17. Now here's some good fun. This is something I've been playing with ever since crashing Michael Cho's studio a couple months back. After inking the original drawing, I flipped the paper over, and inked some shadows and textures on the back.
18. I ran the shadow layer through stages 2-5, flipped it over, and copied onto a layer between the color layer and the line layer.
19. I dropped the opacity on the shadow layer down to about 20%.
20. And then, after locking the transparency on this layer, too, I painted in some color to the shadows.
21. And then, a little extra tweaking. I used the brush tool, set to a large size and semi-transparent, to add a bit of warmth to the skin, and then I hit the lower face and the right hand with the dodge tool to fade out the shadows. The line around the eyes was changed to a dark blue... just, you know, whatever little adjustments were needed to make the thing feel complete.
And there you go! Three days of blog content from one little drawing! I mean, a coloring tutorial! Hurray! Dragging it all out like this may make it seem pretty involved, but half this stuff is completely rote, and goes by pretty quickly.
If you have any questions, or suggestions, please lemme know!
Now—put up yer dukes!