Well you can, but I'm sure you can't do anything amazing in it like in photoshop...
Crestent lvl 50 Mind/Emp Controller http://i125.photobucket.com/albums/p...cGallary-1.jpg
http://crestent.deviantart.com/
http://www.creyindustries.com/viewhero.php?id=21809
I'm sure that if you cleaned up a sketch so that it has nice solid linework, you could.
Please read my FEAR/Portal/HalfLife Fan Fiction!
Repurposed
Can you color with photoimpression?
I have an old sketch i would like to color