Is this already known?
http://www.forzamotorsport.fr/news/53-traces-et-11-000-calques-pour-forza-motorsport-5-163331.html
Its a french site, i translatetd it with google and the guy says that there are 11.000 possible layers on a car =)
Interesting:
When choosing the circuit, I could browse the fourteen environments offered by Forza Motorsport 5 and count the number of versions of each. Here is the list of 57 tracks available:
Bernese Alps (6 plots)
Circuit de Catalunya (3 plots)
Circuit de Spa-Francorchamps (Track 1)
Indianapolis Motor Speedway (2 plots)
Circuit des 24 Heures du Mans (Three tracks, including the Bugatti)
Mazda Speedway Laguna Seca (Track 1)
Mount Panorama Motor Racing Circuit (Track 1)
Tour of Prague (4 plots)
Road Atlanta (2 plots)
Sebring International Raceway (3 plots)
Silverstone (3 plots)
Test Track Airfield (12 tracks)
Top Gear Test Track (7 tracks)
Yas Marina Circuit (5 plots)
I went to have a look at the editor delivered propose that total 11,000 layers . It will be possible to create 3000 layers on larger surfaces (both sides and hood / roof), and 1000 for smaller faces (front bumper and rear). By cons, it will not be possible to import vinyl groups created in the previous Forza, which, with a change of platform, was almost inevitable.