m — mid-region slope. Folds temperature: m = 1/temperature.
Optionalpivotpivot (middle grey) placement — changes where the curve centers, hence its shape. "top": μ = max(ℓ) − offset. "entropy": μ = Σp·ℓ = −H (center of mass in tonal space). "median": μ = the logprob at the 50% cumulative-mass boundary (auto-levels).
Optionalpivotshift applied to the pivot base: μ = base − pivotOffset.
β_h — highlight rolloff scale. ≤ 0 ⇒ no shoulder (highlights stay linear).
β_t — shadow rolloff scale. ≤ 0 ⇒ no toe (shadows stay linear).
w — half-width of the linear mid region. Infinity ⇒ no rolloff (pure temperature).
HLG sampling parameters — a piecewise tone curve on the logprobs. See
02d723a:docs/archive/hlg-sampling.md. Knobs are in nats (the logprob unit).