My 1st tutorial! I decided to take advantage of my latest deviation and screen capped a shit load of what I was doing lol.
This is For separating Line art from background art to making coloring easier. Other people use Multiply to color their pictures without messing up the line art which is fine, but I use this technique specifically for when I color line art which is another tutorial I'm gonna post up later.
Cel shading my way-
The character being used is from left 4 dead and owned by Valve
But I drew him here XP