Step 1: Doc started out as a rough sketch that I scanned and placed into Photoshop.Step 2: I used the sketch as a guide to draw the body on a new layer with the pen tool. Usually the characters I draw have an outline (like the sketch) but I went a different direction this time.
Step 3: Next I added details to his head and lower body (again with the pen tool instead of the usual brush) on a separate layer. Adding details to a separate layer makes it easier for me to make changes.
(Not shown: The part where I try to decide if I should go ahead and draw his wiener or not)
Step 4: I added each arm on a separate layer as well. This made the shading that's coming up in the next step easier to do. Note that his right arm is on a layer underneath his body.
Step 5: Then I added shading on yet another separate layer. Again, that makes it much easier to edit if I don't like the way it looks.
To do the shading I selected his body, then created a new layer. I then had a blank layer with a selection in the shape of his body. I used the brush to add the darker blue shading. Because I was painting inside a selection that was the exact shape as his body, the shading didn't slop over into the background (I hope all that makes sense). I repeated the process for each arm.
Step 6: Finally I added a shadow under his floating feet, an energy ball around his hand, and a scratchy painted background, all on additional layers. Layers are your friends, kids!