Here’s another spot rendered with mental ray.
The environment and car were rendered and composited with live action ink and effects from Houdini.
Originally envisioned as a filmed piece, it was decided later that the car and environment would be replaced with a purely rendered version. The artists matched the shot car so closely it was impossible to tell the difference. This allowed the freedom to change how the commercial was shot while maintaining the original look and feel the director desired.
Take a look here: 2013 Toyota Avalon: Formula