update: until further clarification I've changed the title of the post to avoid any further possible misunderstanding. I take the blame for this one guys. Sorry about that. You sure keep us on our toes;)
Guilherme is also kind enough to discuss the project and show what he did to achieve the final image.
He created a series of renders in Blender internal and Yafray. Then composited them all together using Photoshop. The making of image can be found at CGTalk.