#tuning

The proven architecture for driving games in s&box: raycast wheels on a single chassis Rigidbody, substepped slip-ratio/slip-angle tire physics with peaked curves, a torque-curve drivetrain, layered assists, and arcade dials on top of a sim core.

Absolute-altitude biome thresholds tuned at one reference amplitude break when the slider moves -- the climate stack squashes or vanishes. Scale every altitude threshold by realized relief.