Jeremy HookeandClaude Opus 5.5 c81368470b LR-EDIT-EFFECTS-GRAIN: film grain from crystal layers (process V3) ...

Grain under the new process V3 is drawn from a simulated emulsion of crystal
layers, after Aurélien Pierre's crystallographic grain model (implemented from
the article's description). It fades out towards black and white as on a print,
is applied symmetrically in the display-encoded domain (no shadow darkening, no
grey specks in blown highlights), and matches Lightroom Classic's strength and
grain width at mid grey.

The emulsion is drawn once per Size / Roughness / seed on two periodic tiles in
frame coordinates and kept as summed-area tables, so each output pixel takes
the exact mean of the emulsion under its footprint: a preview is the export's
grain box-downscaled. CPU and GPU read the same tables (the GPU from the finish
kernel's aux buffer). V1 and V2 keep their value-noise grain exactly.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-11-02 23:30:16 +11:00

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LR-EDIT-EFFECTS-GRAIN: film grain from crystal layers (process V3)

2026-11-02 23:30:16 +11:00

Cargo.toml

M12: SAM 3 Object and Describe masks (pure Rust, Metal)

2026-10-06 20:15:04 -03:00