I noticed after the update that files worked in Photoshop and saved back to LR display different amounts of shadow detail between the Library and Develop modules. The Library module is the correct one. When in the Develop module, all sliders are in their default state. When viewing in PS, all is good. When viewing in LR Library module, all is good. When viewing in LR Develop module, shadows are crushed. When exported to jpg, etc, shadows are crushed.
I went ahead and uninstalled and then reinstalled version 11.5 and the problem doesn't exist.
I noticed after the update that files worked in Photoshop and saved back to LR display different amounts of shadow detail between the Library and Develop modules. The Library module is the correct one. When in the Develop module, all sliders are in their default state. When viewing in PS, all is good. When viewing in LR Library module, all is good. When viewing in LR Develop module, shadows are crushed. When exported to jpg, etc., shadows are crushed. See the screenshots below.
Is anyone else experiencing this?
2019 iMac 8 Core i9.
Please, Moderator: Do not move this to my Discussion post. It needs to be in the Bug section for Adobe to see it.
I've reported this issue on a post located in the Discussion boards. I failed to select "Bug" for Conversation Type, therefore have seen minimal response and no solution. I understand I'm not supposed to post more than once about the same subject, but I don't know how else to get this info to the Bug section so that Adobe engineers will see it.
The problem is shadow detail is lost and crushed when viewed in the Develop Module. If I disable the GPU acceleration, the problem goes away.
Please see: https://community.adobe.com/t5/lightroom-classic-bugs/how-do-i-write-a-bug-report/idi-p/12386373
Note: 10X people will see this post here vs posting in bugs. It may be that no one is able to reproduce the issue you are seeing and that is why no one is responding. I cannot reproduce the issue so far.
Thank You! I really appreciate your being helpful.
@DevinDahlgren wrote:If I disable the GPU acceleration, the problem goes away.
If turning OFF GPU works, it's a GPU bug and you need to contact the manufacturer or find out if there's an updated driver for it. This is why disabling GPU is an option as more and more functionality moves to the GPU in newer versions of many Adobe products.
Also see: https://helpx.adobe.com/photoshop/kb/photoshop-cc-gpu-card-faq.html
Thank you, Digital Dog. I confirmed I am on the latest version of my macOS, which is Monterey. My iMac is a 2019 5k i9 8 Core machine. Lightroom is convinced my GPU is compatible with full acceleration (see attached screen grab). This was not an issue before LR 12.0. I have not updated to the latest macOS Ventura because I want to avoid early release issues that sometimes occur. Maybe that would solve the problem. I guess I'll run LR with GPU Acceleration turned off. I understand that even though LR 12 says it's fully compatible, it is still possible an update to the driver is necessary.
Again, thank you for helping me understand where the source of the problem is coming from.
Does it still do the posterization of the shadows when zoomed in? I have seen this before on the forum and it turned out to be a problem with color management and bit depth precision in the display profile when working with the 16-bit linear prophotoRGB color space Lightroom develop works in when translating to the display profile. How are you calibrating your display? Are you making sure to create a ICC v2 display profile as you should?
Does the problem disappear when you test with GPU acceleration disabled in Lightroom's preferences?
Yes. The posterization still exists when zoomed in.
I use the Xrite system with their i1 Display device and save the profile. I use the profile created, but I'm unsure exactly if it's an ICC v2 profile.
Yes. The problem goes away when disabling the GPU acceleration.
Interestingly, this is not a problem on my earlier versions of LR, including 11.5.
If the problem goes away when turning off GPU acceleration it is likely not a display profile problem. I would recalibrate the display if I were you as it might help. There is a setting in the i1 Display preferences for whether the software creates a v2 or v4 profile if I rremember correctly so worth it to ttry. The fact that the behavior changed when going to v12 might mean there is a bug in V12 with the GPU code and how it color manages. This is a bit of a recurring issue with Lightroom
Found the setting. It was set to v4. I changed it to v2 and created an updated calibration. I was no improvement in LR. I think you're on to something with it being a bug. I'll wait for future updates with the hope this will be resolved. Thank you for your suggestions and time. Cheers! Devin
Please forgive me if I've misunderstood the process for getting this bug report in front of the right people. I posted about this after updating to LR 12.0 last week. There was little response to my post. Could I be the only one experiencing this issue?
The issue is crushed shadows and posterization in the blacks in the Develop Module. All is good when viewed in the Library Module. One thing confirmed is that the issue goes away when Graphics Acceleration is disabled.
27" 5k Retina 2019 Intel i9. macOS Monterey 12.6.