const BELT_SHAPE: { 9 fields }
The belts: the ridged field's scale, and how a range reads on each crust
under each motion. lid* is the stagnant-lid scarp field,
(1 − ranges)^power · gain + offset.
The belts: the ridged field's scale, and how a range reads on each crust
under each motion. lid* is the stagnant-lid scarp field,
(1 − ranges)^power · gain + offset.