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Designer, channel mixer with alpha offset 100% creates rendering issues, not clipped to artboard

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  1. create a new designer file, size 64x64px.
  2. add 2 artboards
  3. add any content, e.g. rectangular shapes to each artboard
  4. 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.239545201_Screenshot2023-01-15at00_06_43.thumb.png.1f7eefb0de5250ead832c578b6677b4b.png


Artboard not clipping afdjustment.afdesign

Mac mini M1 A2348

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.


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  • 3 weeks later...
  • Staff

Thanks for your report @NotMyFault - interestingly I can replicate this without the need to use artboards, and I believe it is due to the same issues raised in your thread here:

Therefore I have updated the development log report for that thread, with the information here :)

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