Run! started out as simply a 3D modeling test, and evolved into much more. The train itself, as well as it's track, and traffic light were completely modeled in 3D, and lit/colored in Photoshop. The rest of the image was matte-painted over the course of a day or so.
This was more of a personal satisfaction motive, as an image I've always daydreamed about; a ravenous, mystical train coming full speed towards the unknown.