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Dehaze estimated haze from a Gaussian of each pixel's darkest channel, so ordinary tones read as haze (-0.5 EV on a haze-free textured ground at +50) and shadows next to bright sky clipped to black from +10. Process V3 takes the Gaussian of a patch minimum (0.5 % of the long edge, separable, O(1) per pixel on the CPU; min_h/min_v on the GPU), eases the response in, floors the transmission at 0.15 and never removes more veil than 90 % of the pixel's darkest channel. V1 and V2 render as before. Sources: He, Sun, Tang, "Single Image Haze Removal Using Dark Channel Prior" (CVPR 2009); van Herk / Gil-Werman running min; own easing and veil limit. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>