For the texture work I used Photoshop. As a part of my research I went to a repair shop near my house, the owner was very kind and let me take some photographs ( Fig. 9).
Here you can see some examples of the textures; the materials have diffuse, bump, and in some cases a specular map ( Fig. 10).
My first intention was to create a night shot, and the first tests for the final image were done with standard Omni lights ( Fig. 11).
After lots of tests, I finally thought it would be better to do a daylight render. There are two Area lights in the scene: one is the main point of light and comes from the door of the repair shop; the other has less intensity and comes from the side of the bike ( Fig. 12).
As I said before, the image was rendered with Mental Ray. I did some tests with Global Illumination, but in the end I did it with Final Gather. The presets usually work well, so I just made a couple of changes to the multiplier and diffuse bounces, because I needed some extra light in the scene ( Fig. 13).