My childhood hero - Optimus Prime! I wanted to put my Wacom Intous5 to the test, and it worked! Based on an online image I found of Optimus, I thought I would re-draw it to look like a "concept" design. 

The original image that I found online, and based the final image on.

Stage 1. The first 3hr sitting includes the top of his body, and left arm.

Stage 2. Many hours later, the right arm and leg are now drawn.

Stage 3. The full out line is now drawn, now to add colour.

Stage 4. The majority of the blue has been added, along with some of the shades of red and grey.