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Inspiring
October 19, 2017

P: LUT/Color Profile problem

  • October 19, 2017
  • 48 replies
  • 2059 views

LUT Color Profile Problem in Lightroom Classic

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48 replies

axmelissarios1
Legend
October 23, 2017
Hey Eartho,

Do you happen to have the link to the post on Reddit that you saw?

Thanks,
Melissa
Melissa Rios, Product Manager, Community Experiences & Platforms | Adobe
Known Participant
October 22, 2017
Not work for me in Adobe Bridge (Camera Raw).
Edit and save file, but after start up app file recovery to "crs:gpu_preferred_system=”" view automatically.
In Camera Raw Settings: "Metal:.....
Inspiring
October 21, 2017
Great thank you! This appears to work for ACR and LR Classic for the time being.  Its not consistent to previous versions.

I hope there is a patch soon that clears up this issue with metal.
Inspiring
October 21, 2017
https://www.dropbox.com/s/cvaxcn612hieuwo/XYZLUT%2BMTX.icc?dl=0

Here is a display profile from me causing issues 
Adobe Employee
October 21, 2017
We'll investigate the display color profiles. Thanks.
Adobe Employee
October 21, 2017
Good to hear that the tip #2 works for you in Lr (see https://helpx.adobe.com/lightroom/kb/crash-gpu-directx-enabled.html to force Lr falling back to OpenGL and see if it helps. The tip works with macOS as well).

The following is a workaround for Camera Raw, it involves editing a GPU preference file at this location:

/Users/[user name]/Library/Application Support/Adobe/CameraRaw/GPU/Camera Raw GPU Config.txt

Edit the text file (actually an XMP formatted file) in a text editor

change the line:

crs:gpu_preferred_system=“”

to 

crs:gpu_preferred_system=“OpenGL”

Save the file and relaunch Photoshop (Or Bridge). This later tip should work for ACR and Lr (Classic or CC) as well.
Known Participant
October 21, 2017
Andy, you use LUT .icc or matrix icc color profile???After update on High Sierra problem with shadows detail i have in: Photos, Safari, Preview and etc apps
Known Participant
October 21, 2017
Yes i have placed config file.Previews in both module the same (view in jpeg) if GPU box is unchecked
(You wrote about preview in RAW. But I specially test with a jpeg file)

P.S. Before updating, the files in both windows were equally visible
October 21, 2017
Evgeny - your system report should not say metal under GPU - it should say OpenGL if you have placed the config.lua file in the Library>Application Support>Adobe>Lightroom folder.  Once you have done that you need to restart Lightroom Classic CC.

I did a video on the install this morning https://youtu.be/qozuHWU60so

Previews have always looked ever so slightly different because they are neither the same bit depth or colour space as the raw data display in the Develop module, which displays MelissaRGB in the Lightroom GUI of the Dev module.

MelissaRGB is actually ProPhoto RGB color numbers plotted on the sRGB tone curve.  In the background Lightroom applies your adjustments via gamma correction to the raw data in ProPhotoRGB and the native raw data gamma - gamma 1.0

Lightroom previews are at best tagged with the AdobeRGB1998 colour space(1:1) or sRGB when small sizes/quality settings are selected.

Hence they will never look EXACTLY the same - but differences are usually near-imperceptible.
Known Participant
October 21, 2017
Tip #2 work,

Graphics Processor Info: 
OpenGL: NVIDIA GeForce GTX 780M OpenGL Engine

Check OpenGL support: Passed

but the difference is still slightly visible between library module and develop. 
Not so much, but still noticeable.
Image for testing HERE

(In Adobe Camera Raw issue still visible )