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

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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.

macOS

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mariab17729629

Participant

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

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dj_paige

Legend

This is probably what you are seeing: https://community.adobe.com/t5/lightroom-classic-discussions/p-colored-quot-pixel-quot-artifacts-subdued-blacks-in-shadow-areas-older-macs-also-visible-on-cr/m-p/13865745

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johnrellis

Legend

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-subdued-blacks-in-shadow-areas-older-macs-also-visible-on-cr/m-p/14375873#M353952

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Lyndsey30196742zm36

Participant

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

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johnrellis

Legend

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

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helennium

Known Participant

Maybe so. But not for me.

Get Outlook for iOS<>

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Lisa4BOYS

Participating Frequently

This is only happening on older Macs - I have a late edition 2015 which runs perfectly. I tried all possible solutions mentioned re GPU & reinstalling older versions of LR. They don't work. I somehow came upon a solution that works for me. I was desperate during holiday card season - I do tons of holiday card family sessions so I kept playing around. After fully editing the image, go to CALBIBRATION. Default is Version 6. Chnage it to Version 4 and all issues will diappear. If you go back and change anything, the calibration will revert to Version 6 & you will need to change to Version 4 yet again. This is time consuming and so frustrating being that this is a service I am paying for. We need Adobe to step in and fix this bug for the older Macs that still work great!

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johnrellis

Legend

@Lisa4BOYS, the inconvenient version 4 workaround is confirmed in Adobe's pinned reply and others in this thread -- glad it's working for you.

Verify that you actually have LR 13.1 installed by doing Help > System Info. Many have reported that setting Preferences > Performance > Use Graphics Processor to Off works around the issue in LR 13.1.

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daveRedShed9UK

Participating Frequently

This doesn't address the fact that as Lisa says this is a service that we are paying for. As we are essentially leasing the software we are not getting value for money, and this could have been discovered with proper regression testing on very common devices used with Lightroom. Adobe really need to acknowledge that this is a big problem for some of their customers, who will have spent a lot of money with them over the years, and either:

- Confirm they will not resolve it and offer those affected a single purchase opt out of leasing (discounted due to ongoing frustrations) of the last good release

- Resolve the issue, and refund some of the costs to those impacted

It's really not on that there are no updates coming out, no formal statement, just monthly collecting our money. I am trying to complete a wedding shoot I did for a friend covering hundreds of photos and it's dragging on because of this. It was supposed to be their wedding present

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Roland Kőműves

Participant

I have a MacbookPro 2015 and the latest lightroom classic, and I have a rendering problem in the dark areas of the images (only in the development module). Previous versions did not do this. I don't understand, someone help me? I have attached a picture of the problem.

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Jao vdL

Community Expert

This looks like the bug described here: https://community.adobe.com/t5/lightroom-classic-discussions/p-artifacts-of-odd-colored-pixels-subdued-blacks-in-shadow-areas-older-macs-also-visible-on-cr/td-p/13865745

Try turning off the GPU support in preferences.

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johnrellis

Legend

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

https://community.adobe.com/t5/lightroom-classic-discussions/p-artifacts-of-odd-colored-pixels-subdued-blacks-in-shadow-areas-older-macs-also-visible-on-cr/td-p/13865745

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rldp

Participant

I have an Intel iMac running Mac OS Monyterey 12.7.2. When I'm editing photos I'm having display issues. Here is what those issues look like:

The bright colours make it impossible to edit a photograph and the colours come and go and appear in different areas of the image depending on the editing I'm doing. I have done hardware tests on my Mac but everything tests okay. Any ideas or help you could provide would be greatly appreciated.

Thank you,

Robin

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dj_paige

Legend

https://community.adobe.com/t5/lightroom-classic-discussions/p-artifacts-of-odd-colored-pixels-subdued-blacks-in-shadow-areas-older-macs-also-visible-on-cr/m-p/13865745#M348408

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codyl51522472

Participant

I hadn't used Lightroom classic on my computer in a while. I imported some images from a friends wedding this week and it's like the photo data is missing when I go to edit them! The shadows are completely clipped to grey with no usable pixels.

First image below is what the raw image look like in the "Library" mode in LR - (exposed for highlights with plenty of room to boost the shadows), but then the second one (the messed up one) is what it looks like in "Develop" mode - shadows are just a flat grey blob with no pixels.

Images from Sony a7RII shot in raw.
Imported into the latest version of Lightroom Classic
MacOS 12.7.
(on a 2015 pro — can't upgrade past Monterey, and I'm hoping that's not the root issue here. Photoshot gives me an error message when I open it saying I'm on an incompatible OS, but LR hasn't shown me that error.)

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GoldingD

Legend

A screen shot of your develop module, complete with history panel, the histogram and at least the Basic Panel are viewable would be better. Oh and make sure that in the filmstrip or in the loupe view that the file name is shown.

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emmaleeh71346515

Participant

In the past month or so all the photos I export from Lightroom have had these blotchy portions in the darkest shadows in the image. Help!! I love editing my photos with deep shadows, so this is killing me.

They don't look like this when I view them in LR, only when exported. I've turned the graphics processor off, and that hasn't helped.

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Rikk Flohr-Retired

Please go to Help>System Info… and provide us the exact installed version number of your software.

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Rikk Flohr: Adobe Photography Org

emmaleeh71346515

Participant

Thanks for your reply. Does this sound right?

Lightroom Classic version: 13.0.2 [ 202311290958-8ff975ea ]

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johnrellis

Legend

For those using LR 13, LR 13.1 fixes the bug with disabling use of the GPU for export. So setting Preferences > Performance > Use Graphics Processor to Off should work around the problem of artifacts in exported images. Whether that results in a noticeable slowth in performance will depend on how old your Mac is and which graphics processor you have.

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DH-art

Participating Frequently

2013 Mac Pro and Lightroom Classic V13.

Not always it seems. Disabling GPU use fixed the colour effects in Develop Mode but I've still had occasional issues with shadow problems in Export but not when opening from Lightroom into Photoshop. The worst of it is it's not consistent.

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johnrellis

Legend

@DH-art, "2013 Mac Pro and Lightroom Classic V13."

Please do Help > System Info and verify you're on version 13.1 (released last night), tthanks.

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alfredom86055269

Participant

, it records them in tif with all the lights, both high and low, does anyone know how to solve this problem.

The only thing I can do is close Lightroom and reopen it but after several images the problem appears again.

I'm working on an Imac, macOS Montery Version 12.7.2

Please help, I have a lot of work editing images and this is extremely late.

I leave a sample image.

Alfred

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dj_paige

Legend

I don't understand this part: "it records them in tif with all the lights, both high and low". Please explain in mroe detail. What does the photo you show have to do with this?

Also, what software are you using? Lightroom (Lr icon) or Lightroom Classic (Lrc icon)? What version NUMBER?

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Lisa4BOYS

Participating Frequently

Totally agree and this issue needs to be fixed but I had to get images to
my clients!

*Lisa Hyland*
Owner / Photographer
www.fourboysphotography.com

*2022 Best of Long Island Photographer!*

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