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

Forum|Forum|4 years ago
November 12, 2021
12 replies
2724 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?

Windows

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Correct answer Lumigraphics

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

Melankaya

Known Participant

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

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.

TheDigitalDog

Inspiring

See: https://community.adobe.com/t5/camera-raw-discussions/camera-raw-generates-acr-files-when-editing/m-p/12845546#M17688

Rikk Flohr: Photography • Adobe Employee , Mar 29, 2022

A .acr file contains non-textual data (binary). Currently that can be an AI-generated pixel-based mask and/or a LUT. Other items will be stored in this file in the future. I am guessing your color preset has a profile that uses a LUT (look up table).

Not a bug.

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"

Rikk Flohr_Photography

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

Legend

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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