Creating illustration based graphics.

To create the above graphics, I selected the insides of the illustration, coloured it up and deleted the under layer (being the illustration.) It gives the effect as though you created the image straight with the paint tool. I created the different levels of shade and the depth effect by using higher and lower opacities of different colours - therefore layering but subtly to give the above effect. This is a good way to create a filler image or an image you can build upon to create a more interesting over-all composition.