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jackdaw_1066
Known Participant
April 14, 2022

P: 32bit document shows banding on Mac Mini when GPU enabled

  • April 14, 2022
  • 22 replies
  • 1349 views

I've just upgraded my 2018 Mac Mini to macOS monterey.

 

Now whenever i open a 32bit exr image it shows extreme banding. It happens on Photoshop 2021 and 2022.

If i disable the advanced graphics all banding goes away, however it is extremely buggy with the advanced graphics turned off. Layer masks often show incorrectly when at different zoom levels with big squires either showing as white or black. The transform handles don't show up unless i zoom out and in again, the heal tool workings just downt show at, doesn't go dark grey, if i zoom out and in again it suddenly fixes it.

 

Where is the bug? In Monterey GPU drivers or within photoshop?

22 replies

E
Community Manager
Erin26Community Manager
Community Manager
April 25, 2022

Thank you all for this information.  I will log a ticket for the team to investigate.

J
jackdaw_1066Author
Known Participant
April 25, 2022

I see no banding in Photoshop 2020 which suggests it can't be a driver issue unless its the switch from OpenCL to Metal.

With no banding in Photoshop 2020 but banding being present in 2021 and 2022 it must be how Photoshop is interpreting the file which surely suggests a Photoshop bug rather than a display driver bug.

TheDigitalDog
TheDigitalDog
Inspiring
April 22, 2022

Well, more and more functionality in newer versions moves to GPU so that might explain the issue, especially IF you don't see banding with GPU off (do you?).

I see no banding on the image you just provided at 100% zoom but it's rather small. I'm also at a loss as to what's up with the embedded profile (Adobe RGB 1998 linear rgb profile) but if I assign Adobe RGB (1998) I still see no banding. 

Even at 200% zoom, no banding. 

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
J
jackdaw_1066Author
Known Participant
April 22, 2022

Here a file

Test File 

There are no issues with the file in Photoshop 2020.

There are banding issues with this file in Photoshop 2021 and 2022

J
jackdaw_1066Author
Known Participant
April 22, 2022

No banding in apple preview

No banding in Photosop 2020

Banding in Photoshop 2021

Banding in Photoshop 2020

TheDigitalDog
TheDigitalDog
Inspiring
April 22, 2022

No banding on your document in apple preview either

 

Confused by 'either'. No banding in Preview but banding (or not) in Photoshop? 

Again, what would really be helpful is an upload of the document you are viewing that shows this banding. 

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
J
jackdaw_1066Author
Known Participant
April 22, 2022

No banding on your document in apple preview either

J
jackdaw_1066Author
Known Participant
April 22, 2022

TheDigitalDog
TheDigitalDog
Inspiring
April 22, 2022

Try viewing my 10-bit ramp PSD in Apple Preview at "Actual Size". Do you see banding? 

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
J
jackdaw_1066Author
Known Participant
April 22, 2022

I have banding in Photoshop 2021 and 2022

I have no banding in Photoshop 2020

Same machine

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