I start adding in textures for the clothes. I have various textures I have scanned in myself (bits of clothing etc) and a few photographs that I use. As he's a pirate it makes sense to go with stripes.
After changing the colour of the textures and changing them again I finally decided on green for the pants (phew!).
I add some 'fur' to the monkey by using the brush tool but changing from a smooth brush to one that is more like a piece of chalk. Light and shadow is then added to make the monkey stand out more.
I just finish colouring the other characters the same way.
Next time - the finished illustration!