Known Participant

Question

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

Forum|Forum|2 years ago
June 14, 2023
173 replies
112147 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.

macOS

This topic has been closed for replies.

Show previous replies

Pamelaann

Participant

Hello

Does anyone know why all of a sudden I get this overlay/artifacts on my images in the Develop pannel? Showing underexposed areas. Does not show up in the Library view side. How can I get rid of it? It will come out on Jpegs when exporting from the Develop side.

TY

Pamela

D

daveRedShed9UK

Participating Frequently

Looks like a known issue. I disabled my graphics processor. Problem gone but slower. Re-enabled to demonstrate the issue. Still no problem. Worth a try? Restart between settings changes. Good luck

johnrellis

Legend

Hi John

The problem is back now!

Lightroom Classic version: 12.5 [ 202308091523-68a7abd6 ]
License: Creative Cloud
Language setting: en-GB
Operating system: Mac OS 12
Version: 12.2.1 [21D62]
Application architecture: x64
Logical processor count: 8
Processor speed: 2.5GHz
SqLite Version: 3.36.0
Built-in memory: 16,384.0 MB
Real memory available to Lightroom: 16,384.0 MB
Real memory used by Lightroom: 940.3 MB (5.7%)
Virtual memory used by Lightroom: 36,874.4 MB
Memory cache size: 54.5MB
Internal Camera Raw version: 15.5 [ 1595 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 256MB / 8191MB (3%)
Camera Raw real memory: 261MB / 16384MB (1%)
Standard Preview Size: 2880 pixels
Displays: 1) 2880x1800, 2) 1920x1200

Graphics Processor Info:
Metal: AMD Radeon R9 M370X
Init State: GPU for Image Processing supported by default with custom export support
User Preference: Auto

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

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Aurora HDR
4) DNA Pentax and Samsung Tether Plugin for Lightroom 5
5) Flickr
6) Luminar AI
7) Nikon Tether Plugin

Config.lua flags: None

@daveRedShed9UK, "Mid 2015 MacBook Pro"

Metal: AMD Radeon R9 M370X"

AMD no longer provides updates to the drivers for that graphics processor. Of the people with these symptoms who have reported their detailed hardware here, they've all been on older Macs running on the AMD FirePro D500 (2013), the AMD Radeon R9 M390 (2015), and the AMD Radeon R9 M370X (2015), all of which were moved to AMD's "legacy support" at least a year or two ago.

Given these symptoms appear limited to a small set of older Mac models/graphics processors with no-longer supported drivers, given that LR codes to the Mac OS APIs and not to specific GPUs, and given the hundreds of problem reports on the forums addressed by upgrading drivers (on Mac, by upgrading Mac OS), Occam's Razor strongly suggests this is a bug in the graphics driver rather than LR. Adobe is constantly changing LR and Camera Raw's use of the GPU to provide better performance and more features, so it's likely that a code change to LR 12.4 trips over a driver bug in a way that the older code in LR 12.3 doesn't. It's certainly possible that the code change in LR 12.4 was itself buggy, but given all the evidence presented so far, that seems less likely.

As you've already learned, setting Preferences > Performance > Use Graphics Processor to Off works around the problem. You could try setting Preferences > Performance > Use Graphics Processor to Custom and then select just Use GPU For Display -- that might perform better. I haven't seen reports here whether that works with these particular symptoms.

You've also indicated you're aware that people have reported rolling back to an earlier version of LR avoids the problem.

D

daveRedShed9UK

Participating Frequently

Hi

When I am editing in Develop mode my disply goes bonkers and is becoming unusable. It happens on my Macbook screen and the attached monitor. I know it's not clipping. I am wondering if I have enabled some weird setting or if I have a bug or hardware issue. I have attached files of view vs develop

Thanks in advance. It's drving me nuts!

D

Darren32963392ix6n

Participant

Anyone else having an issue where the image looks fine in Library mode, but the second you switch to Develope mode everything gets wonky? Would be fine, except the exports are all messed up too.

D

Darren32963392ix6n

Participant

Turning off the GPU fixed the issue for viewing and editing the images. It even correctly exports for PNG formats. But JPEGs are still messed up.

Is there a known fix for that? Or is there a way to roll back to a previous version of Lightroom that actually works?

D

daveRedShed9UK

Participating Frequently

What issue are you seeing with JPG exports? Thanks

A

agiledogsPhotography

Known Participant

Updatng my catalog due to the latest versin of lightroom has completely destroyed nearly 40k images in the gallery. Images are raw files and even with reset all mages appear completely overexposed and color are way out in left field showing that images are not being read correctly as they were prior to the update. Running on Win 11 with an amd GPU, As of now I am not opening/upgrading another gallery for fear of lossing any more images. I put a lot of time into how I edit photos and as of now processing business orders is impossible with this current version. Is there a means to roll back the update to have a working version of lightroom as the original gallery is still avaiable, but unusable by the current release version of lightroom classic

A

agiledogsPhotography

Known Participant

OK I was able to restore a previous version and open the old gallery. There is something off either n the new color mixer from v12-v13 or the gallery update process. Guess I wll stay at v12 forthe time being.

A

agiledogsPhotography

Known Participant

The overall problem is with hardware acceleration of AMD RAeon GPUs. Apparantly they need to be turned off for lightroom to show correct colors

G

g.a.d20504080

Participant

I have strange colors. Mostly during the developer mode.

What am I doing wrong.

I can’t find it.

Version 12.5 and also 13.0

johnrellis

Legend

@g.a.d20504080, please see this previous post:

https://community.adobe.com/t5/lightroom-classic-discussions/p-artifacts-resembling-clipping-odd-colored-pixels-in-some-areas-older-mac-systems/m-p/14147312#M338089

D

dholt8569

Participant

Using lightroom classic on a macOS Monterey:

I have started having an issue where my images look like clipping is turned on the shadows but it isnt. I will be editing and sometimes it will fix itself but a majority of the time the screen shows distortions in the shadows. When the image is exported though it looks fine. Anyone encountered this or know how to fix? Could it be a computer issue?

johnrellis

Legend

@dholt8569, the driver for your computer's graphics processor may be old and no longer supported by the manufacturer.

1. Please do the LR menu command Help > System Info and copy/paste the entire contents here so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.

Click the Apple icon in the upper-left corner and do About This Mac. Post a full-resolution screenshot (not a phone pic) of the About window.
https://www.lightroomqueen.com/community/help/createscreenshot/

2. As a workaround, set Preferences > Performance > Use Graphics Processor to Off.

D

dholt8569

Participant

Now I understand, thank you. That worked!

D

defaultyotvxy3nwfkw

Participant

why does this keep happening when I go to edit anything in the Develp Module - help! It's impossible to edit correctly.

kglad

Community Expert

what app?

D

defaultyotvxy3nwfkw

Participant

Lightroom Classic 12.5

Andrej MichelcichAuthor

Known Participant

I read with much interest the whole thread of interventions and comments apparently originated by my post of June 14 and must realize with much disappointment that at today's date the problem has not been fixed yet; disabling GPU is NOT a solution. I also notice a that in these days Adobe has released Lightroon Classic 13.0; it may have addressed and fixed the issue but I will never know because, as far as I can see in my account, this new version is NOT COMPATBILE with my iMac, presumably because it is run under old — but up-to-date — Big Sur 11.7.10. So my only way-out would be to buy a new iMac and see. I still don't know if for this I have to thank Apple, Adobe or both, but this does not make me happy at all!

johnrellis

Legend

"disabling GPU is NOT a solution."

Do you mean disabling does not cause the artifacts to disappear?

Andrej MichelcichAuthor

Known Participant

Most of the times artifacts disappear, but I believe that GPU is there to do its job and turning it off because by doing so you apparently fix another problem does not seem to me the correct approach. LR must work properly with GPU enabled, as the system itself claims immediately after turning it off.

B

BodaPhoto

Participant

Over the last couple of months LR has been driving me nuts.
I cannot get rid of highlight/shadow clipping on my images. I have ensured the clipping triangles on the histogram are not selected (both my clicking the triangles on the histo and using the J command)
I have also uninstalled and reinstalled LR.
It's still happening and its really stopping me from seeing the image properly whilst editing.
The way I edit I dont want it 'fully' exposed and want to keep shadows etc

It's also appearing in Photomechanic
Is it time to go to Capture One? Honestly had enough of this issue.

Please help and suggest something I've not tried. Example of image in PhotoMechanic.

B

BodaPhoto

Participant

Over the last couple of months LR has been driving me nuts.
I cannot get rid of highlight/shadow clipping on my images. I have ensured the clipping triangles on the histogram are not selected (both my clicking the triangles on the histo and using the J command)
I have also uninstalled and reinstalled LR.
It's still happening and its really stopping me from seeing the image properly whilst editing.
The way I edit I dont want it 'fully' exposed and want to keep shadows etc

It's also appearing in Photomechanic
Is it time to go to Capture One? Honestly had enough of this issue.

Please help and suggest something I've not tried. Example of image in PhotoMechanic.

GoldingD

Legend

What version of Lr or LrC is this? From your image I suspect this is not LrC.

Show more replies

Sign up

To post, reply, or follow discussions, please sign in with your Adobe ID.

Sign in to Adobe Community

To post, reply, or follow discussions, please sign in with your Adobe ID.

Scanning file for viruses.

This file cannot be downloaded