What is CGI and how does the creation process look like?

This interactive webspecial shows the entire CGI process illustrated with the Mercedes-Benz S-Class Coupé. The webspecial contains 7 modules. Each module depicts one step of the CGI process and its possible outcomes. The user can explore the modules by changing the lighting, materials etc.
The entire site is a HTML 5 One-Pager.

Link: mackevision.miu08.de/