P: Colored "pixel" artifacts/subdued blacks in shadow areas (older Macs) (also visible on CR)

[Andrej Michelcich]

I updated LrC to 12.4 yesyerday. Since then a number of pixels in multiple colors appear appear quite often on the image, mostly in the areas of blacks/darks and when using Tone Curve commands. It's similar to the red/blue pixels which denoted clipping in the areas of blacks/whites, but they appear in very many different other colors. Sometimes they disappear, or decrease, after actioning the commands again, sometimes they do not. Is anybody else facing the same problem which I encounter now for the vey first time after many years of use of LrC? Thank you in advance for your advise.

[johnrellis]

Building on dj_paige's reply, see this post for workarounds:

https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[johnrellis]

Moderators, @Rikk Flohr: Photography, please merge with this thread:

https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[johnrellis]

Moderators, @Rikk Flohr: Photography, please merge with the existing thread:

https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[Lisa4BOYS]

Verifying that I have LR 13.1 - nothing works except changing the calibration to Version 4 on EVERY image.

[Hallux38]

I'm running a 2015 MacBook Pro that works great and am having the aforementioned issues that you have really helped me manage. Thank you!!

[Lyndsey30196742zm36]

Is there still no resolution to this issue? Outside of going back to an older version of LR?

[johnrellis]

Many have reported that running LR 13.1 and setting Preferences > Performance > Use Graphics Processor to Off works around the problem.

[helen_glazer]

Maybe so. But not for me.

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[mariab17729629]

Hola!

He tenido problemas con mi imac y desde que he reinstalado LR me aparecen algunas imágenes en el módulo de revelar como posterizadas.

Luego al exportarlas las imágenes se ven bien y si las abro en el PS también, así que deduzco que no debería de ser de ningún problema ni de las imágenes, ni del ordenador.

Alguien sabe de que puede ser?

Gracias

[dj_paige]

This is probably what you are seeing: https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[johnrellis]

Building on dj_paige's reply, see this post for several workarounds:

https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[johnrellis]

Moderators, @Rikk Flohr: Photography, please merge with the existing thread:

https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[Nadss]

Does anyone know what is happening here? I updated to version 13.1 and since then, this colour distortion (or whatever it is) has been happening in Develop mode. I haven't touched the histogram at all (but have played around with it and nothing helps). It makes editing very difficult. Let me know if any of you have any thoughts that could help. Thanks!

[johnrellis]

@Nadss, see here for the cause and workarounds:

https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[Lisa4BOYS]

The ONLY thing that has worked for me (and I have tried ALL worarounds after spending several hours on the phone with Adobe), is changing the CALIBRATION to Version 4 from Version 6.  Unfortunately, you can't SYNC this and you have to do this for every single image.

[Malcolm15C3]

You can't have tried all the work arounds, or else you have a different problem ;). Lr 12.3 works.  It's the last version guaranteed to work.  Lr 13.1 apparently works if you disable GPU support.  If you're on a version of macOS that doesn't support Lr 13, don't use 12.4 or 12.5, go back to 12.3.  Rolling back to old versions requires you to save your metadata to your images first and then potentially re-import it if the catalogue isn't compatible, possibly losing some newer features, virtual copies, etc, but it works better in the long run.

This problem has been known about since the middle of last year.  No word whatsoever from Adobe.  I can only assume they have no plans to fix this for people who can't upgrade past macOS 11 Big Sur.  Adobe will quite happily continue taking your montly ransome and give nothing in return.  Shame on Adobe.

SHAME ON ADOBE.

[helen_glazer]

It happens with Mac OS 12.7, too, so it's not just affecting OS 11. None of the suggested fixes have worked for me, however, I do notice that if I switch from Develop to Library mode, the weird colors go away and you can see the results of the edits you've made while in Develop. Not a perfect solution, but better than nothing. Also I have found if you are exporting the affected images to JPEG it is best to export from Library mode for that reason — that way the artifacts don't show up in the exported file.

[Malcolm15C3]

This isn't about the version of macOS you are running, but the version of Lightroom.  Adobe broke Lr between Lr versions 12.3 and 12.4.

I haven't haven't used Lr 13, but apparently they introduced another regression in 13.0 where it used the GPU for exports, even if GPU support was disabled in the Lr settings.  This later regression is supposedly fixed in Lr 13.1.

[rjh77]

When loading images into Lightroom Classic I am seeing extreme noise in the dark areas of the image in processed in version 6. When I switch the process version to 3 or 4 the noise disappears. I am running on macOS Montery. The images are CR2, CR3 raw image from Canon 5D M II and Canon R6 M II.

[Jao vdL]

If you are on an older Mac (which would be my guess since you are only on Monterey), your problem is probably this: https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

The fix is to turn off gpu acceleration.

[rjh77]

Thank you! That was the problem. I disabled my GPU function and everything is back to normal.

[johnrellis]

Moderators, @Rikk Flohr: Photography, please merge with this thread:

https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[Ellarsee]

I've got some old photos that could really benefit from modern noise reduction. 
I ran the noise reduction, and the first thing I noticed was blue in the deepest shadows, I then noticed weird posterization in other shadows.
When I exited to loupe mode, the weird effects disappeared.  This is good in terms of getting a final image, but it's still impossible to do careful processing in develop when that isn't what the image will look like.

I'm running lightroom classic 13.1 on Monterey on a late 2013 trashcan mac pro

[johnrellis]

@Ellarsee, see here for workarounds:

https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-sub...

[Notabeagle]

I'm running the latest update for Lighroom Classic, on a MacOS Monterey 12.7.2

When I edit photos (usually of a dark coloured dog), on my preview any harsher shadows come up grainy, and either a hue of orange/red/green, and almost inverted??

I've attached some images of how it appears in my preview, and how it saves once exported (Which is usually normal) But it is obviously inconvienient and a bit furstrtating not being able to see how the image looks before exporting....

And ideas on how to fix would be great!