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Alex ChambersandClaude Opus 5.5
aa6dfe3b30
Testing the first version on ILCE-7RM4 photos found a partly clipped sky between bare branches leaning cyan to teal under #523's edit, where Lightroom shows white. Where only green clipped, red and blue say such a sky is a pale cyan-blue; the rebuild kept that colour until halfway to full clipping, and darkening and a camera profile showed it. Colour borrowed from another surface (bright foliage below the sky) could also push green up, with a small step where green first clips. - highlight::reconstruct_with: the colour of a pale partly clipped pixel (saturation relative to the colour model's white below 0.2, easing off by 0.4) fades to the clipped neutral from the first clip on instead of from halfway; brightness and strongly coloured pixels keep the old schedule. - Borrowed colour counts less and less as both the pixel's own channels and the rim's colour contradict it (0.15 to 0.4 stop); either alone can be wrong. - Right past the rim every estimate continues the rim's colour (it used to hold the clipped channels at their clip, for the neutral estimate only), so the first clip has no step whatever lent the estimate. The rim is built whenever there is clipping. - Nothing jumps where a later channel clips: in the rim distance and the contradiction, a clipped channel counts as the lower bound it is, and a channel goes over to that from 0.75 of its clip; a channel about to clip is a floor capped like the clip floor it becomes. - Tests: a pale sky above yellow-green foliage with thin dark branches in it (no step where green clips, no green from the foliage, the same beside the branches, neutral well past the clip); the fringe test compares the sky beside the branch with the sky away from it, on its way to neutral; a band whose red clips second next to a rim of another colour renders without a step, in six layouts. - docs/parity.md: the Highlights note. Render cache version 28. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>