admin
28e18893cd
The built-in lens filter, simulated the way it is done in Photoshop: pull the highlights out with a hard contrast curve (out = 2.5*in - 1.5, black below 0.6), Gaussian-blur that selection, then Screen it back over the photo at reduced opacity. Screen against a near-black pixel is a no-op, so areas with no highlight within the blur radius come back byte-identical while lit areas spread their light. One 0..10 knob drives both the radius (4%..1.9% of the width, ~10..50px at 2560 wide) and the opacity (0.15..0.5), matching the recipe's 15-50px radius range. The extraction composes on top of the recipe colour matrix so a monochrome look glows white instead of leaking the original colours back. Runs in the Skia export engine only; the P5 native path is not wired into the app (dev parity probe only), so it is left alone for now.
The file is empty.