Valve Interview - Awesome

Valve talks Half Life 2 modding! - modDB.com: “@valve-gabe: The tradeoffs between the two models are the accuracy of the simulation at the wheels. You can trade less accurate wheel collisions/response for less CPU time. You can do several vehicles with the full simulation on our target machines, but you can always use the CPU for something else if the wheel simulation isn’t as important to your mod.”

awesome.