> If you use the Q3DOimoPhysics behavior you will have gravity force on the Z axis.
But for multiple cars, 4 wheels per car, I can't rely on that many wheels (Plus Car Body's) to do the Physics calculations.
It costs too much and the physics acted too unreliable.
Weird. We did up to 8 cars with four cylinders each for the wheels and it was pretty smooth for the original “Robot Rumble”. IIRC it ran fine on a 2017-era phone.
You could also create a simple Unity-style wheel collider with 4 raycasts downward. You can tune the raycast to take as much CPU time as you can spare.