[Bug Report] GPU Preview glitch with clipping masks and transparency (since Illustrator 29.6.0)

[Ajlouny]

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:

1. The issue only appears in GPU Preview.
2. Switching to CPU Preview restores correct rendering.
3. Changing the color profile or color model did not resolve the issue.
4. Deleting Illustrator's preferences folder also had no effect.
5. Rolling back to Illustrator 29.5 resolves the issue.
6. Screenshot attached.

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

[Ton Frederiks]

Bug  reports are best posted here, where the Illustrator Engineers are looking:

https://illustrator.uservoice.com/

[Ajlouny]

Thanks Ton.

I installed Illustrator Beta 29.7.41 to capture a screenshot (attached).

If anybody is having the same issue, please upvote the report here: [Bug Report] GPU Preview glitch with clipping masks and transparency (since Illustrator 29.6.0)

[Ton Frederiks]

Thanks, it can be system and GPU card dependend (I cannot replicate it).

But you are probably not the only one.

[Anubhav M]

Hello @Ajlouny,

I tried replicating this behavior on my end, but could not. Could you please share a detailed screen recording of your workflow and the problem, and the following files, so I can check this with the product team:

For macOS computers: 
1) AISniffer file
- Close all Adobe applications
- Navigate to the Illustrator Preferences folder and copy the AiSniffer file to the desktop from this location: Users/YOUR USERNAME/Library/Preferences/Adobe Illustrator #(version Number)Settings > AISniffer
 
2) System Report
- You can generate it from the Apple icon > About This Mac > System Report > Save to the desktop.
 
Please upload the files to Google Drive/Dropbox/etc and share a public link here or via DM so that we can investigate this further.
 
Looking forward to hearing from you.
Anubhav

[Ajlouny]

Hello @Anubhav M 

Here's the screen recording. I will DM you the AISniffer.

Thank you

[Anubhav M]

Hello @Ajlouny,

Thanks for sharing the details. Kindly allow me some time to check this with the team.

Feel free to reach out if you have more questions or need assistance. We'd be happy to help.
Anubhav

[Ajlouny]

Yes sure, take your time; I am happy now on Illustrator 29.5.1 🙂

Thank you @Anubhav M 

[skz_7332]

I have this exact same issue, I have to keep switching from GPU to CPU to view artwork. Am also on iMac Pro 2017, but with Mac OS Sequoia.

[Anubhav M]

Hello everyone,

I have reported this problem to the product team and they are currently investigating it. I will update this thread as I have more info. In the meantime, kindly upvote this UserVoice (https://adobe.ly/3GG0k5l) and add your comments. Doing this will help prioritize this issue, and you will be notified of any updates.

Feel free to reach out if you have more question or need assistance. I will be happy to help.

Anubhav