Sony A7R II camera JPEGs are distortion-corrected by default while the raw is not. On the public
CC0 ILCE-7RM2 samples the JPEG is up to 15 px of 1440 off, and the misaligned window frames alone
pushed the held-out RMS to 0.108-0.115 (gate 0.10): the photo opened in the grey neutral fallback,
13 L* too dark. The same shot with distortion correction off fits at 0.059.
When the fit on all pixels fails the gates, try it once more, with the same gates, on pixels whose
3x3 neighbourhood in either proxy spans a luminance ratio of at most 3. Fits that already pass are
unchanged (29 other corpus ARW/NEF/RW2 files render pixel-identical). ILCE-7RM2 ΔE76 vs the camera
JPEG (registered) 16.6-16.9 -> 3.7-3.8; corpus GX80 19.1 -> 7.9. RENDER_CACHE_VERSION 11 -> 12.
15feb6e1fc