terrain.fade_hillElevation
What it does
How fast hills ramp up to full strength once they start. Small = hills snap in over a thin band; big = a soft, spread-out build-up with no sharp hilly zone.
What you seeSmall values snap from smooth plains to full hills over a knife-thin band; large values give soft half-strength roughness everywhere instead.
Gotcha
Same zero quirk as fade_plain: 0 switches hills off entirely instead of making the change instant.
See it on a real map
Reference seed 12345, size 4500. “Try live” opens the generator with the value applied.
default 0.75
0.1 — hills snap in sharply try live →
2.0 — soft muted hill relief try live →
0 — quirk: hills switched OFF try live →