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P: Wrong gamma when blending with transparency grid

5 Votes
Explorer ,
Jul 06, 2016 Jul 06, 2016

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The "transparency grid" used to visualise the transparency in a document appears to get blended with the image using Gamma 1,0 instead of honouring the gamma of your document (usually ~2,2). Confirmed in CS6 and CC2015.  

This means that you do not get a realistic preview of how the transparency actually will blend once you put the image on top of something else.

Workaround: Use a pattern fill layer or similar with a grid instead. That will blend correctly.
Solution suggestion: Blend the transparency grid using the same gamma as the rest of the document.

It's easier to show with an image (view full size):  
RackMultipart201607064457219e8-61cc81e0-ab64-446f-8aaa-843a31188608-1150238982.pngRackMultipart201607064457219e8-61cc81e0-ab64-446f-8aaa-843a31188608-1150238982.png

Expected behavior: Both images should look the same.
As you can see a soft transparency-transition looks very wrong against the transparency grid (and the colour shifts slightly), but looks fine against an image of a grid.

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If you turn on "Blend RGB Colors Using Gamma 1,00" the image of a grid blends like the transparency grid does. But this obviously not a good workaround (and you cannot use it to get the transparency to blend using 2,2 anyway as the transparency grid ignores the setting): RackMultipart20160706318221puc-1ff62829-a4cd-49f1-ac80-77cd16e0a110-234758240.pngRackMultipart20160706318221puc-1ff62829-a4cd-49f1-ac80-77cd16e0a110-234758240.png

Bug Unresolved
TOPICS
macOS , Windows

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3 Comments
Explorer ,
Sep 05, 2016 Sep 05, 2016

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Participant ,
Jul 27, 2017 Jul 27, 2017

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Community Beginner ,
Apr 25, 2020 Apr 25, 2020

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Just now came across this, and it answers a problem I had years ago when I started using 1.00 gamma blending. All of the transparencies look much too thin. I would like to see a new preference field for transparency, defaulted to 2.20.

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