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BUG: Unexpected (strange) outlines on semi-transparent shapes

Creating shapes whose edges are perfectly aligned and then setting "no stroke" and uniform fill color works as expected with 100% opacity.
With different transparency results in strange artifacts on the edges.
The attached screenshot shows the problem and the example file is the source (bottom right shape in "Test source.ai").

MacMini M1 2020
macOS 11.2.1
Illustrator 25.2

3 votes

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  • Someone75 commented  ·   ·  Report

    Disable GPU preview? One cannot work anymore in Illustrator and turned off GPU preview! I cannot believe this bug (like some strange others, too ...).

    And again no reaction from Adobe.

  • Anonymous commented  ·   ·  Report

    Has this been fixed yet? Still experiencing this issue 10 months later.

  • DM commented  ·   ·  Report

    Hi Egor,
    you're right.

    Disabling the preview the problem disappear.
    However doing this Illustrator is slow and almost unusable.

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