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

Hello,

I have just acquired a Sony A7CR and I have erratic color display problems similar to clipping (even though this is not activated) on images viewed in LRC and in their export as well as solid colors dark. This appears randomly on images as soon as I start developing them and makes it impossible. IF I exit LRC and re-open it, the same image may appear without these artifacts, or not. Is random. This looks like a bug, has this ever happened to you?

Regards

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.

If you're on Mac, 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.

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.

This happens to me in all the raw images that I import into Lightroom... it is not the color profile, it is not the shadow or highlight warning, and it is not solved with either old or new versions of Lightroom. They are raws from a Canon R5.

Does anyone know the solution?

Thank you

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.

Oh wow - thank you. I am not sure I have the brain power hahaha!!! 

How many folders have you created in LrC 13?

Try this. For all folders you have created in LrC 13, In LrC, Library Module, Grid View, select all photos and Click Control (PC) or Command (Mac) + S. That willl create XMP files that have the processing information that you have done under LrC V 13. do this with LrC 12 closed.

Then... In LrC V 12, import those folders that were originally only in LrC 13. This will give you the processed versions in LrC V 12.x. You should see a message to update the metadata. Do that.

I tested this yesterday to see if I could use the LrC V13 XMP files to update the same images in LrC 12 on a different machine and it worked fine.

Only what you did since you upgraded. You could also make v13 save all your changes to the recently imported images to xmp files and then when you import those images into your v12 catalog in lr Classic v12 it will have most of the edits and keywords etc you did.

But I will have lost all of my work yes?

If you didn't delete it, your v12 catalog should still be around, just open that one. You will not have any changes or imports since you upgraded but at least you will be able to work.

It seemed to work but then exported with the issue again!! I roleld back but then 12.3 won't import my catalog as it's 'too new' so now i seem out of options!