Here is a typical automotive storyboard, I've rendered hundreds of these over the years, having done storyboards for every automotive manufacturer. My long experience in Detroit helped me get automotive assignments from ad agencies from all over the U.S. as well as in France where I worked for several years. These particular renderings were done in the 5 x 7" size using markers on high quality layout paper under the usual tough deadline.
Automotive assignments are a very specialized field which not every comp artist is able to handle. The ad agencies rarely supplied reference material which added another element to the normal tough deadline. Frequently I received several commercials to do over a weekend.