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]

See this post for workarounds:

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

[Notabeagle]

That's solved it, thank you for your help!

🙂

[johnrellis]

@Notabeagle, to help others here, which workaround helped you?  (Not all workarounds work for all people.)

[Notabeagle]

This option:

1. Update to LR 13.1 and set Preferences > Performance > Use Graphics Processor to Off. Most people with this issue report that works for them. (It won't work on 13.0 through 13.0.1).

so far seems to be working for me 🙂

[Photo_Rene1979]

I've read most of the threads on this topic, and I'd like to report my problem also.

- I've been using LRC v12 and MacOS 12.6.3 for a while - everything was fine;

- I've decided to try LRC v13 with MacOS 12.6.3 and had all those issues mentioned;

- Downgraded to LRC v12 back again, and problems were solved;

- I've updated the system to MacOS 12.7.3 and now my LRC v12 is also having the same issues on the low light areas.

It corrects if I turn off the Graphic card on Performance menu. But then I loose zoom shortcuts which I'm addicted (shift+mouse). I haven't tried the calibration v4 yet. But funny enough sometimes this problem auto-correct itself. I haven't figured out what I've done differently to bypass this issue.

here is my system info:

Lightroom Classic version: 12.5.1 [ 202311071911-3076beb2 ]
License: Creative Cloud
Language setting: en-GB
Operating system: Mac OS 12
Version: 12.7.3 [21H1015]
Application architecture: x64
Logical processor count: 12
Processor speed: 3.5GHz
SqLite Version: 3.36.0
Built-in memory: 65,536.0 MB
Real memory available to Lightroom: 65,536.0 MB
Real memory used by Lightroom: 3,152.3 MB (4.8%)
Virtual memory used by Lightroom: 45,064.7 MB
Memory cache size: 38.7MB
Internal Camera Raw version: 15.5 [ 1595 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX
Camera Raw virtual memory: 927MB / 32767MB (2%)
Camera Raw real memory: 1011MB / 65536MB (1%)
Standard Preview Size: 1440 pixels
Displays: 1) 1920x1200

Graphics Processor Info:
Metal: AMD Radeon HD - FirePro D500
Init State: GPU for Image Processing supported by default with custom export support
User Preference: GPU for Display Enabled

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/sportphotogallery/Pictures/SPG/SPG-v12.lrcat
Settings Folder: /Users/sportphotogallery/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr
4) Nikon Tether Plugin

Config.lua flags: None

I just hope Adobe can make a fix for that! I guess many people are having those issues. And I work with a catalog with more than 180.000 images...

[Carlo5E66]

Hi!, I have a problem with my display. Gray highlight appears whenever I adjust my shadows and blacks. There's no problem when I export it. I just want my photos appear without the gray highlight in loupe view. The gray highlight disappears when I change my process version to version 1 or 2 in settings menu.

Current version (6)

Version 2

[AxelMatt]

A possible cause could be a defective monitor profile.

Please take a look here: How do I change my monitor profile to check whether it’s corrupted? | The Lightroom Queen

[Per Berntsen]

You seem to have the issue described in this thread:

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

[Carlo5E66]

Problem soved. I just turned of my graphics processor.

Probably a problem with my graphics processor. I'm using Mac Pro (2013), Monterey 12.7

[johnrellis]

"Probably a problem with my graphics processor [AMD Radeon HD - FirePro D700]. I'm using Mac Pro (2013), Monterey 12.7"

AMD stopped providing driver bug fixes for that graphics processor a couple years ago. LR is very sensitive to driver bugs.

[Udo Tanske]

woran kann es liegen, dass ich in den dunklen berichen nach einen Weile immer fabrbige Pixel habe. Ich nutze Mac OS 12.7.4 Lightroom Version 7.2

[johnrellis]

"what can it be that I always have fabrige pixels in the dark reports after a while. I'm using Mac OS 12.7.4 Lightroom version 7.2"

See this post for LR Classic workarounds:

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

Similar workarounds for LR 7.2 will probably help.