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Hi, create a new designer file, size 64x64px. add 2 artboards add any content, e.g. rectangular shapes to each artboard add channel mixer adjustment to artboard 2, select alpha, set offset to 100% (or use PT filter with A=1) Initially, the artboard 2 gets black which is expected, all else keeps as before. now the rendering gets erratic when zooming : large random areas get impacted by adjustment, it is not contained / clipped to the artboard. Artboard not clipping afdjustment.afdesign

on MacOS, Photo has a rendering bug affecting probably all adjustment layers and filters nested to vector shapes. If you modify the alpha channel, the child escapes the parent rectangle (clipping / masking) and affects a random area (depending on zoom level). This is expected in principle, but the issue is that tendering becomes erratic and depending on zoom level. 1. Canvas rendering deviates from thumbnail rendering in navigator panel. 2. canvas limits are not respected. To reproduce: create new document, RGB/8 add rectangle, fill with horizontal linear gradient with black color, alpha from 0 to 100% add one of these, try both masking and clipping position channel mixer (alpha channel, offset = 100%) levels adjustments (alpha channel, set output black level to 80%) curves, drag left node from 0 to 0.8 in y-axis) Procedural texture filer, use A=1 as formula set adjustment / filter to increase alpha to 100% below one example.