Did you ever look at a brochure picture and think to yourself that it would look better if they added some options or fixed some of the glaring errors presented? I do all the time. As a result I have dozens of renderings that I have made over the years. Yesterday I worked on a '69 Biscayne rendering, the day before a '70 Impala 400. To me it is the computer equivalent of doodling.

Attached is a before pic of a '68 Impala Custom Coupe, and an after pic with Z03, N95, U75, L35, N10 & A01 all added.