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GPU Preview glitches with clipping masks and transparency (since Illustrator 29.6.0), white rectangle appears below

I've encountered a rendering issue starting in Illustrator 29.6.0, and it's still present in 29.6.1. Here's how to reproduce it:

  1. Create a simple circle.
  2. Create a simple rectangle.
  3. Place the circle inside the rectangle using a clipping mask.
  4. Apply any transparency to the circle (e.g., set opacity < 100%, or add a drop shadow).

Result:
The rendering becomes corrupted for any object positioned beneath the clipping mask (try placing a filled shape underneath to see the issue clearly).

Additional Notes:

The issue only appears in GPU Preview.
Switching to CPU Preview restores correct rendering.
Changing the color profile or color model did not resolve the issue.
Deleting Illustrator's preferences folder also had no effect.
Rolling back to Illustrator 29.5 resolves the issue.
Apologies for not including a screenshot – I rolled back to 29.5 before capturing one.

System:
iMac Retina 5K (27", 2017)
macOS Ventura 13.7.6

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Ahmad shared this idea  ·   ·  Report…  ·  Admin →
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Illustrator (Desktop) Bugs: Rendering Issues (GPU, CPU)

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