@DerHildebrand Assuming the car deforms inelastic I guess it is the same if I hit a wall and I hit a car with same speed and same weight since the impulse change is the same.
If the wall however breaks it is better to hit the wall.
@DJSnM Remember your tweet about that game where you have forest fire simulation? I made a quick Simulation in #GodotEngine I need to add wind now aswell... what do you think?