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Andrej Michelcich
Andrej Michelcich
Known Participant
June 14, 2023
Question

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

  • June 14, 2023
  • 173 replies
  • 111536 views

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.

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    173 replies

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    M
    Marije Kristel
    Participant
    October 7, 2023

    Hi, I am using the latest version of lightroom, but I see something I've never saw before while editing.. somehow dark/contrast colours in my photo's automatically turn blue/purple/red/yellow. 

    I'ts very hard to edit my photo's right now and I've tried everything to remove this but nothing helps. Does anoyone know what this is??? Please help!

     

      johnrellis
      johnrellis
      Legend
      October 7, 2023

      See the pinned reply at the top of the thread into which your post was merged

      M
      Malcolm15C3
      Participating Frequently
      October 7, 2023

      The pinned post is a bit ridiculous trying to blame old drivers.  These are Macs, we don't worry about drivers.  Furthermore, these are on devices still supported by Apple, running recent versions of macOS such as Big Sur or Ventura.  The breakage happened between versions of Lightroom (12.3 -> 12.4), which points to a bug and missed QA by Adobe.

      The workarounds are either: rollback to Lr Classic 12.3 or disable GPU acceleration (but then Lr might nag you to re-enable it)

        G
        ggie!3
        Participant
        October 3, 2023

         

        Has anyone had a similar problem in LR Classic?

         

        As you can see from the above, there seems to be a weird bug/glitch while editing. This is an unedited image (note I have black out the peoples faces for privacy) but apart from this, I have not made any images to the image. The original/raw doesn't look like this and even if I save the image, it doesn't save like this. So I think the issue is with the viewing window in LR. The only way I can get rid of it is if I close LR and re open. But it will come back again after a editing for a while. 

        It doesn't necessarily come back on the same image.

         

        Can someone help? Or can Adobe fix? Unsure how to report the issue directly with them.

         

        Thanks in advance. 

          M
          Malcolm15C3
          Participating Frequently
          October 3, 2023

          Disable GPU support or rollback to Lightroom Classic 12.3. For me, disabling the GPU gave me a pop-up message on next app launch nagging me to re-enable GPU, so I rolled back to the older Lr.

           

          I just found some notifications in my spam folder, but the messages are missing here.  If somebody from Adobe needs a sample, please contact me directly.

          Rikk Flohr_Photography
          Community Manager
          Rikk Flohr_PhotographyCommunity Manager
          Community Manager
          October 2, 2023

          Summary:

          We can still not replicate this failure on test or production machines at Adobe. This appears to occur on Lightroom 12.4/Camera Raw 15.4 and later on very old Macs (8 Years and older) and is likely due to out-of-date video drivers on no longer-supported or updated GPUs.

          The issue manifests as visual color artifacts in the Develop view only but doesn't always appear on exported images. It can also manifest as less-than-black deep shadow areas.

          • Some customers report that disabling GPU restores functionality to normal. 
          • Others have reported that updating to Sonoma has provided relief.
          • Reverting an image to PV4 eliminates the artifacts for some others. 
          • Reverting to LrC 12.3 or CR 15.3 has provided relief for some.


          11/30/2023 

          • It has been discovered by some customers that this affects Camera Raw rendering as well.  The summary text has been updated to reflect this. The two separate Pinned Posts on this thread have been consolidated.

           

          11/22/2023:
          An Update and an Inquiry to afflicted customers:

          • First, the missing content that was mysteriously moved to a 2009 Cold Fusion thread should be restored. We apologize for any confusion that was caused. 
          • Second - and perhaps more importantly, we need to ask a question of those who are afflicted with the unusual colored pixels. 


          10/27/2023: Update - we've received responses from three persons volunteering to screen share with the Classic team.  At this time, we do not need any additional volunteers. This thread will be updated once the investigation is complete. 

          10/17/2023: Update and a request for persons to demonstrate the issue

          As we cannot replicate this failure on test or production machines at Adobe, we are looking for a few people to demo the issue for us. 

          Requirements: 
          The Classic team is requesting the aid of a few persons who can demonstrate this issue in a live screen share. In order to be considered, you need to be able to: 

          1.  Recreate the issue at will with GPU in the ON setting
          2.  Connect with the Classic team via a screen share  (MS Teams or similar). Note: the team is IST, and the hours may be odd, depending upon your location.
          3.  Review MacOS System settings live with the team
          4.  Demonstrate the odd pixels in Lightroom Classic 13.0.1.

           

          If you are able to meet these requirements, direct message me with your full name and the email where you can be contacted.  We should only need a few people to reply to confirm the information the team is requesting. 

           

          Thank you for your patience. 

          10/2/23 Update:
          Additional posts formerly in this thread are currently MIA. The community forum team is investigating. We do not know if we will be able to restore the missing content.  As of 11/22.2023: The content has been restored.

           

          Rikk Flohr: Adobe Photography Org
            V
            victorigsa
            Participating Frequently
            August 28, 2023

            Hola, 

            Al utilizar en la pantalla de calibración la versión 6 (actual) y la 5, lightroom me lava los negros empastados de la foto, en cambio en la versión 4 no. El problema también es que cambio a la versión 4 para no tener este problema y continuamente me cambia a la 6 automáticamente, por lo que tengo que estar todo el tiempo cambiando de versión.

            Tengo el lightroom actualizado en la última versión v12.5

            Espero que sea posible solucionarlo, a ver si alguien sabe como arreglar esto.

             

              Sean McCormack
              Community Expert
              Sean McCormackCommunity Expert
              Community Expert
              August 28, 2023

              I think you mean Process Version. I see no difference between 4, 5 and 6 on an unedited photo. When I increase to +60 Blacks, I'm not seeing a difference there either.

              Sean McCormack. Author of 'Essential Development 3'. Magazine Writer. Former Official Fuji X-Photographer.
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