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S
sol�nelgp
January 7, 2026
Question

After synchronizing severe visual corruption : Two images overlap.

  • January 7, 2026
  • 1 reply
  • 165 views

Lightroom Classic 15.0 – Mac M1 – macOS Sequoia

After synchronizing settings across multiple photos, some images display severe visual corruption: parts of different photos appear superimposed on one image. 

The issue:
- Appears both in Library and Develop modules
- Is triggered by syncing or copying settings
- Is not fixed by clearing previews, cache, disabling GPU, or deleting XMPs
- Files themselves are not corrupted
- Did not happen before upgrading to Lightroom Classic 15.0

System:
Mac M1
macOS Sequoia 15.x
Lightroom Classic 15.0

This makes synchronized editing unreliable and unusable in production workflows.
Is this a known Camera Raw / rendering issue in 15.0?

1 reply

dj_paige
dj_paige
Legend
January 7, 2026

I would not jump to the conclusion just yet that this is caused by synchronizing. It happens after synchronizing does not mean synchronizing is the cause — correlation is not causation. And I cannot think of a mechanism with digital files how one image can be superimposed on another image in the actual file (unless you do some fancy work in Photoshop, and this is a .CR3 file so Photoshop hasn't been involved or it would be a TIF/PSD/JPG). Since these are RAW originals, most programs (including LrC) have no functions that modify the original pixels anyway.

 

My first guess would be a GPU problem in drawing the screen or a memory problem caused by defective chips or a hard disk malfunction. I also wonder what evidence leads you to say that the files are not corrupted.

 

Honestly, I have never seen this before. One thing you can do is share the original RAW image on DropBox, WeShare, OneDrive or similar and provide a link so we can download it and look at it in LrC on our own computer to see if the problem persists.

    S
    sol�nelgpAuthor
    January 14, 2026

    Hi, Thanks for your answer.

     

    I'm sure it's not GPU probelm as I have the same issue on an other computer. 

    I thought more about an issue with AI because the problem often come on photos with IA : denoise, upright and Erase with IA generative. 

    dj_paige
    dj_paige
    Legend
    January 14, 2026

    Please share (if you are willing to do so) the original RAW image on DropBox, WeShare, OneDrive or similar and provide a link so we can download it and look at it in LrC on our own computer to see if the problem persists

     

    I thought more about an issue with AI because the problem often come on photos with IA : denoise, upright and Erase with IA generative.

     

    I don't think it has anything to do with AI, there is no AI feature or non-AI feature in Lightroom Classic that appears to make a double-exposure out of two different images.

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