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effectcraft/crates/effects
arnav-hiwarkar 39a3b565d8 #3487, #3488, #3489, #3490, #3491: Levels (Individual Controls): levels and gamma take After Effects' ranges
Input/Output Black and White of every channel take -10000..10000 and Gamma
goes down to 0 (it keeps its wider maximum, 10), After Effects' recorded
valid ranges in the same units (the .aep mapping is Conv::Plain). Defaults
and the 0..1 / 0.1..3 sliders are unchanged.

Gamma 0 renders as the existing 0.01 floor, an exponent of 100, so an HDR
value a few times Input White would overflow f32 and an infinite curve
times an empty output range is NaN. The curve is now bounded at +-1e6 on
the CPU (Lv::apply) and the GPU (fxt_lv), so the output stays finite over
the whole range; values below the bound are unchanged.

The engine regression (tests/effect_ranges.rs) sets both ends of each row
through prop.set, checks undo/redo, save and reopen, and that a project
saved with the narrower ranges opens with the new ones and its values.
2026-11-12 15:11:21 +05:30
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