Sinon, l´idée de ne faire des dégâts que sur les voitures de course à du bon:
http://forum.beyond3d.com/showpost.php?p=980981&postcount=937
En plus, il faut modéliser les dégâts suivant ce que veut chaque constructeur, il y en a même qui n´aime pas le tuning, je comprends mieux les choix de PD.
Some clarification points:
• There is a myth in the gaming press that a licensed *production car* game cannot do damage. The Midtown Madness, Project Gotham Racing and Forza Motorsport franchises have all featured damage and licensed production cars. RalliSport Challenge also featured damage, but it would be considered a licensed race car game. There is a big difference between race cars and production cars from a licensing perspective. It is much easier to do extensive damage on race cars - including roll-overs.
• There are limitations that different car manufacturers place on the extent of damage that can be inflicted on their production cars. The restrictions usually involve the appearance of driver safety and car quality. It’s not in the best interest of their brands to appear unsafe or poorly made.
• Getting the manufacturers to accept damage isn’t about money; it’s about respecting the brand and forming a strong partnership. The car manufacturers have too much to lose if a game hurts their brand image. Cash advances and royalty checks from a video game can’t even come close the loss of revenue caused by a tarnished brand image. We have worked very hard over the years to develop strong partnerships with our manufactures.
• Different manufacturers hold the bar at different heights. For legal reasons we treat all of the manufacturers the same. This means we have to go with the lowest common denominator for all manufacturers. At the same time, we work with the outliers to raise their bar.
Unfortunately, different manufacturers have radically different hang-ups. Also, the hang-ups are not proportional to the real-world prestige of the brand or its importance to the Forza franchise. I´m not going to name names, but I will rant a little bit.
One American manufacturer will allow damage all day, but is adamant about cars not rolling over. We have several other manufacturers that will only allow roll-overs if all of the others agree first – hellofa Catch 22. One of our European marks can´t be used in PR materials as solo, winning or losing. It must always be pictured with other cars and dead even with them. Another European brand will allow painting and decals, but we can’t allow players to put "thunder" on the side of the car. I’m not even sure what that means. I assumed it meant lightning, but when I asked that specific question, the representative was very insistent: "no thunder".
We have brands that charge ridiculous fees and make pretty "meh" cars. We got very popular brands that make awesome cars and charge next to nothing. Some brands are dead set against DLC. Other brands are willing to sponsor DLC.
There is a huge difference in how thorough each brand is when approving the car renders. On version 1, we accidentally submitted a car render from one Japanese manufacturer to its rival as one of their own cars… and they actually approved it as their car.
As you’d expect, these licenses are usually a lawyer to lawyer affair, but sometimes I get involved so we can escalate the matter higher up in the company. Some brands control other brands. Some brands hire outside licensing companies. Other brands have a licensing division within their legal or marketing departments. Sometimes different regions of a brand control the licensing, but usually it’s at a corporate level.
We have one European manufacturer that allows damage and rolling over, but is fairly unreasonable about upgrades and painting - core features to Forza. Truth is, I´ve spent 80% of my licensing time with just this brand. All that, and we still only got the licenses signed for half of the cars that we built from that brand. And yes, that means we spent months building cars that will never make see the light of day. I had to do back flips just to keep the small group of their cars that I felt were critical – we even got Peter Moore involved with this brand to help us pitch a higher level of partnership.
In the end, it’s all about building a partnership – which takes time. The key is to show them that we have passion for their brand and will defend it. It helps that we make a simulator – they know our goal is to achieve reality and celebrate their brand in a franchise, not use their brand to sell a quick product.
Dan Greenawalt
Game Director
Turn 10
alors je comprends mieux 
surtout avec les 700 voitures des GT
les GT c´est l´extase a ce niveau il y´en a pour tout les gout 
va voir la liste des voitures individuelle par modele et revients a genous ici