A DNG whose profile has a LookTable but no ProfileToneCurve (Adobe Standard in
Lightroom-written DNGs) was not tone-fitted and rendered with the near-linear
default tone: flat and ~0.8 EV darker than Lightroom. A look table defines colour,
not tone, and the fit already applies the tables to its proxy. The preview may now
be 10% of the raw's long edge (and 384 px), so Lightroom's 1024 px previews
qualify. Two lossy ILCE-7CM2 DNGs now match Lightroom's mean linear RGB within 3%.
Render cache 65, look version 10.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
