Main's reconstruction (#607) replaces this branch's rewrite of highlight::reconstruct. Kept from the
branch: develop_binned_masked (clipping decided per sample before averaging) and the denoised twin
using the same mask. New: highlight::reconstruct_masked, #607's reconstruction with the clipped
channels told by the mask (block means as lower bounds), shared with reconstruct_with through a
generic clip test (no slowdown on full-size images), and CameraColourModel::rebuild_highlights_masked
so binned previews keep the colour model's clipped white. RENDER_CACHE_VERSION 38.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Brandon ThomasandClaude Opus 5.5
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