Opacity and Mask Define Knockout Shape - not working with GPU Preview
Opacity and Mask Define Knockout Shape - This option does not work if GPU Preview is enabled.
Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.
Tom Moulaert commented
I have the same problem! macOS 10.14.6 Adobe Illustrator 24.2
I will send you my file and a screencast using mail.
Adobe Certified Expert Illustrator
Shubham Chaudhary commented
I have also encountered this issue.
Please find attached a file that demonstrates different behavior in GPU preview. The file has a Group(KO) containing two rectangles - green(50% opacity and Opacity & mask define KO shape enabled) and red. When GPU preview is enabled, enabling the Opacity & mask define KO shape option has no effect on the rendering and green knocks out red.
Sarah Khan (Illustrator team) commented
Can you please send any file or video of the issue on firstname.lastname@example.org