This topic with an instructable explores this technique I think. Comics would be cool. The above video demonstrates better than the static instructible.
Hackaday provides many interesting project highlights. Today it tipped me off to a full color edge-lit display .
Basically just load any random image you want to have on your nightstand/mantle into Photoshop, isolate only one color layer, then bring that over to Illustrator and work as normal to vectorize it.
Actually, it would probably be better to vector first, then split the RGB layers. His approach is a bit different, but really it is a pretty simple application.
RGB works decently well …