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.

[alxsobrino]

Here's an example of what I'm experiencing a while back in LC on some photos, either on the shadows or the highlights, only in develop mode but this artifacts make it to the exported photo. Anyone knows what are those? How can I get rid of them? Any help would be very appreciated.

[alxsobrino]

Update, when exporting in png the artifacts don't show. I'd like to export in jpg though so, the post still applies. 

[dj_paige]

Please be specific. Please point us to the "weird artifacts" that you see.

Also, what software are you using to display the photo outside of Lightroom Classic.

[alxsobrino]

If you look at the example images you'll see a white stain in the dark low part of the coat, that same white stain is also in the final jpg image previewd with Preview app in Mac OS 12.7

[alxsobrino]

First image, library mode: correct, 2nd image, develop mode: white stains in shadows, 3rd image, same white stains in shadows in the final jpg file

[dj_paige]

Try turning off the GPU in LrC (Preferences->Performance->Use Graphics Processor)

Also, it might be this: https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-b...

[John R Ellis]

Most of the people experiencing these symptoms are on older Macs with graphics processors whose drivers are no longer supported by their manufacturer.

There are many reports that setting Preferences > Performance > Use Graphics Processor to Off helps with the image display, but many report that it does not help with Export, most likely due to a LR bug in Export.  There are many reports that rolling back to LR 12.3 works around the issue, with no reports I know of to the contrary.

[John R Ellis]

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

https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-b...

[mikeo35829746]

Recently, after exporting from Lightroom Classic, I've been noticing some unusual dark areas in the deep shadow areas. I've attached a sample and circled some of the bad areas. I've also attached the original file. This problem does NOT occur if I use Camera Raw instead of Lightroom. Thanks for any advice!

[John R Ellis]

Most of the people experiencing these symptoms are on older Macs with graphics processors whose drivers are no longer supported by their manufacturer.

There are many reports that setting Preferences > Performance > Use Graphics Processor to Off helps with the image display, but many report that it does not help with Export, most likely due to a LR bug in Export.  There are many reports that rolling back to LR 12.3 works around the issue, with no reports I know of to the contrary.

[John R Ellis]

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

https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-b...

[Susu4478]

Gracias por todas vuestras respuestas. Al final se trata de un tema de incompatibilidad de la tarjeta gráfica con la nueva versión de Lr y no he tenido más remedio que actualizar mi iMac. Ninguno de los "trucos" que leí me funcionó y desde ayer ya tengo mi nueva máquina.

[mikeo35829746]

My problem with splotchy areas in the dark shadows has been resolved. I was at LR Classic 13.0.1 which I uninstalled. I then installed version 12.5. I also turned off auto update in the CC App. Looks like the most recent version was released out into the wild world of working professionals with some bugs!

[studio228835314zt0]

1. Version of the app
   Lightroom Classic
2. Platform and OS version
   Mac, Monterey
3. Basic steps to reproduce the problem
   perform edits 🙂
4. Expected result and actual result
   to not have yelow dots on the image
   having yellow dots on the image

Hi there - 

Any thoughts on whats causing this issue?
The yellow dots / noise if you're wondering 🙂

Happens on a lot of images in this catalogue.
This occurs on one machine (and exports the files with this too) and not another...

[kajat97107878]

When is this going to be fixed?? It's killing my work flow - I have tried everything. My catalogue won't open in the older LR versions so I'm forced to manually remove these coloured shadow. Not okay. 

[dnak3000]

Some of my Jpegs are getting wierd artifacting on the image (mainly in blacks).  Any thoughts?

[ouiouiphoto]

Hello. Known bug https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-b...

[John R Ellis]

Most of the people experiencing these symptoms are on older Macs with graphics processors whose drivers are no longer supported by their manufacturer.

There are many reports that setting Preferences > Performance > Use Graphics Processor to Off helps with the image display, but many report that it does not help with Export, most likely due to a LR bug in Export.  There are many reports that rolling back to LR 12.3 works around the issue, with no reports I know of to the contrary.

[John R Ellis]

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

https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-b...

[dnak3000]

Tx John. 

[teresah82230218]

After exporting from LR, some of my jpegs are looking like this.  It's very inconsistent.  It's not happening to all images.  What am I doing wrong.  I'm a pro photog and have been using LR for 20+ years.

[ouiouiphoto]

Hello. It is a known bug https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-b...

[John R Ellis]

Most of the people experiencing these symptoms are on older Macs with graphics processors whose drivers are no longer supported by their manufacturer.

There are many reports that setting Preferences > Performance > Use Graphics Processor to Off helps with the image display, but many report that it does not help with Export, most likely due to a LR bug in Export.  There are many reports that rolling back to LR 12.3 works around the issue, with no reports I know of to the contrary.

[John R Ellis]

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

https://community.adobe.com/t5/lightroom-classic-bugs/p-artifacts-resembling-clipping-warnings-odd-b...

[Teuzzo78]

Hi, to better explain the problem I attach some photos.

After export I see the photos without shades in the darkest areas. From the library module I see the photo "001 library" correctly while if I move to develop I no longer see the shades as in photo "002 develop", even by lightening the photo a hole remains in the shadows "003 develop" but if I move to the module library everything goes back to normal "004 library". If I touch the lowlight triangle in the histogram nothing changes.
Unfortunately if I export the file the result is with shadows with holes and I don't understand why.
I use a Mac Pro Late 2013 with AMD FirePro D300 2Gb, LR + raw camera updated.

I hope you can help me thanks