In the art section people are just showing off their projects, not selling them. If you are looking to buy some sets, go to market->art/textures.
For me the set looks like someone just had a toribash figure, and a few bottles of spraypaint, and he sprayed the figure, and drew the eyes with a pen.
I'm not a fan of this kind of set, and also red + green makes me puke.
Anyways, i'm not the right person to cnc you, but i think you should make the lines (if there are any) point out by drawing on them with black.