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Question: Does anyone understand the .acr file that appears to be produced by Camera Raw in v14.0?

Community Beginner ,
Oct 27, 2021 Oct 27, 2021

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Since updating to PS v23.0 and Camera Raw v14.0, it appears that Camera Raw now outputs a second sidcar file - in addition to <filename base>.xmp, I now see <filename base>.acr.

I once negelected to move this file along with the raw file and xmp file.  When I opened the image again in Camera Raw in the new directory, Camera Raw indicated that the select subject mask was not available and had to be re-run.  After re-running the mask it appears to be fine.

 

Does this .acr file contain information related to the new masks, and, if it is misplaced, can it be reconstructed witout loss of information by rerunning the masks in ACR?  I suspect the same situation could occur if a file is edited in ACR, then moved and imported into Lightroom without the .acr sidecar.  I've not tried it importing edited files (with our without the .acr sidecar) into LR (Classic) yet.

 

Environment:  MacOS Catalina and Nikon .NEF files, but I doubt this situation is OS or RAW file dependent.

I haven't been able to find any information on this at all.


Thanks,
Don

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correct answers 1 Correct answer

Community Expert , Oct 28, 2021 Oct 28, 2021

The .acr files store the new masking data introduced in ACR 14. XMP sidecar files are text but the .acr file is binary. They must all be moved together.

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Community Expert ,
Oct 28, 2021 Oct 28, 2021

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The .acr files store the new masking data introduced in ACR 14. XMP sidecar files are text but the .acr file is binary. They must all be moved together.

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Community Beginner ,
Oct 28, 2021 Oct 28, 2021

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Thank you!

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Community Beginner ,
Oct 07, 2022 Oct 07, 2022

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They are sidecar ai-generated selection masking data. If you used "select sky" and "select subject" and disabled the "embed xmp in DNG" option, they appear. I think the continuous process of updating the selection functions generated with "artificial intelligence" will be stored in these files to reload them quickly instead of recalculating them every time.  (Oct 2022) there are two (sky, subject) so far.

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