It looks like most of it is pillow-shaded. Avoid solid outlines going all the way around an area, instead have areas of highlight and shadows, like where the light hits/cannot hit. I would take a look at some shading tutorials, you can find some in the Resource/Tutorial Sticky.
And fyi, try not to bump unless you have a decent update (more content, edits, etc.) and some time has passed. Generally the rule is 3 days.