In a way, I find these single material previews more exciting to look at because you can truly see the work that went into the car. As you know, sometimes you can fake it by using a texture/bitmap to simulate something modeled. With these renders you see exactly how incredibly detailed the models are. Or, in your case, how detailed your finished PCH track or LA Canyons track is.
I hope some day you decide to do a timelapse video modeling a car from start to finish,
@A3DR. I learn so much better when I can see something done, rather than told told what to do. I just love your work so much.