Im putting this one is here because its not airbrushed. I have struggled with this one with my airbrush for some time. I decided i wanted to try it with graphite pencils. I will be trying this again with the airbrush in the next couple of days. Here is my reference. The first layer is on. Its a cartoon skull so all the shading and highlights are coming from my head ( not the easiest thing to do.). But i believe its getting there. Now for some erasing for texture and highlights. I will post another pic after i give it more texture.