Cars

[Alex]

Did you notice the white car with the number G4?

The numbers on the tall clock thing (if I know what you're talking about) indicate the current place and lap of all the cars. Since the lead cars can. actually catch up to and lap the cars behind them you can't actually tell just by looking at the track who is in the lead (the front guy could be a full lap behind the person behind him).

Photorealistic images and photorealistic animation aren't quite the same thing. Though for unmoving backgrounds they would be close.