The RAF look fit compared the uncorrected sensor proxy with the camera
JPEG, which is already corrected for vignetting, so the tone curve learned
the brightening and the render then applied the embedded vignetting
correction a second time. Shadows and midtones came out up to 0.6 / 0.3 EV
too light on X-S10 files.
`look_proxies` applies the embedded correction to the sensor proxy of
every per-file fit (colour, monochrome, near-black fallback), as
`fit_dng_tone` already did. LOOK_VERSION 13, RENDER_CACHE_VERSION 71.
60 held-out X-S10 RAFs: mean ΔE00 2.71 -> 2.55, 32 better, none worse by
more than 0.05.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
