I've painted on zip and added a zip texture to the background. For added dramatic effect I've thrown down a layer of shadow with a little gauzian blur to soften up the edges. Now that I'm looking at it, I'm contemplating going forward with color, since I had added a blue grey hue to the BG. I'll have to let it sit for a few days to see if the sketch warrants the time to drop color on to the cat. What's your take? Color or no color?