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Coma004
Participating Frequently
November 12, 2021
Answered

P: New File with .ACR extension when saving Camera Raw settings

  • November 12, 2021
  • 3 replies
  • 2637 views

Hello Community,

 

I used ACR in version 13 and upgraded to version 14 as it was available. When editing pictures in ACR, I was used to see .xmp files when saving my changes for the edited pictures - this file contains the settings I made according to the raw file. Now, there is an additional file with the extension .ACR. I can't find any info on this type of file or for what it is used. Can someone tell me?

 

This topic has been closed for replies.
Correct answer Lumigraphics

And it appears that a separate sidecar is needed because XMP is XML (plain text) and .acr is a binary file.

3 replies

Melankaya
Melankaya
Known Participant
May 25, 2023

Weird I didnt start getting ACR sidecars until this last update only xmp despite editing in ACR

@ m e l a n k a y a
M
mikeb28930794
Known Participant
June 13, 2022

Just upgraded to PC CC 2022 (V23) yesterday (too many projects going on to repeat previous upgrade debacles). I have a workflow where I scan film negatives to DNG files using Silverfast 8.8 (48-bit raw). When I open the file in ACR and change image settings (apply a profile, apply geometry and crop tools) then open to PS, ACR leaves a file behind with the extension ".ACR".  ACR settings have "DNG Handing" set to "Always use Sidecar XMP files." This file extension doesn't seem to be documented anywhere and I cannot find it searching in this forum (search ".acr" returns every ACR post since dirt).

These file are small, and not necessarily troublesome, but I am trying to understand why and what is being left behind on my drive.

M
mikeb28930794
Known Participant
June 13, 2022

Uh, the pointed to post, ".ACR file contains the pixel versions of previously generated AI masks (Select Subject/Sky) so they don't have to be recalculated each time you open a raw file with previous AI masking elements." None of the edits have used masks. But then, there are no bugs in Adobe, only features.

TheDigitalDog
TheDigitalDog
Inspiring
June 13, 2022

You asked what these files are, you were told. You state “This file extension doesn't seem to be documented anywhere” but it has been.

You state : “None of the edits have used masks.”

Did you see the explanation: “and/or a LUT”?

So now you're telling us the files are the result of a bug?

 

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
    Rikk Flohr_Photography
    Community Manager
    Rikk Flohr_PhotographyCommunity Manager
    Community Manager
    November 12, 2021

    The .ACR file contains the pixel versions of previously generated AI masks (Select Subject/Sky) so they don't have to be recalculated each time you open a raw file with previous AI masking elements.

    Rikk Flohr: Adobe Photography Org
      L
      LumigraphicsCorrect answer
      Brainiac
      November 12, 2021

      And it appears that a separate sidecar is needed because XMP is XML (plain text) and .acr is a binary file.

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