well i haven't decided on what to do for a background.but im open to suggetions if you have any. i liked how this came out because i decided to use different a technique on sai. wich was coloring in my darker and lighter shades of the base color with the brush tool. then i would erase some of the edges to make it smoother and then i would blur some the areas. after that i got my air brush tool and lightly covered my shaded airs with the same shade of my base color. keep in mind i had to my shading on a new layer and not on the on with the base color.