Lightroom Classic CC: Luminance Range Masking fails on PS Images where Desaturate was used:

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  • Problem
  • Updated 1 week ago
  • Solved
Hi, I've noticed this issue with LR Classic 8.1 and Win 10 (1803). I had experienced this problem on a few occasions, but couldn't notice a pattern until now: it only happens with desaturated tiff images (maybe with psd's too). Then I found this report, but I see that, in theory, it was fixed with v7.5.

Anyway, I've captured this small video to show the issue, so that others can check too:

https://youtu.be/AmBHYC90Mcs

Is it me or is this same problem back? I've also tried disabling GPU, it didn't seem to make a difference.
Thanks.

Note: This conversation was created from a reply on: Lightroom Classic: Luminance range masks do not work for grayscale images.
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Carlos Oliveras

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Posted 4 months ago

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Photo of Todd Shaner

Todd Shaner, Champion

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I can confirm what you're seeing with LR Classic 8.1 on my Windows 10 1803 system when using RGB TIFF, PSD, or JPEG files that have been completely desaturated (i.e all pixels R=G=B) in PS.

Actual grayscale TIFFs, RGB TIFFs with only some desaturation, and Leica Monochrome B&W DNGs work correctly with the Luminance Range Mask controls.
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Rikk Flohr, Official Rep

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I can duplicate as well and will log it as a bug. Note: ACR Works as expected.
(Edited)
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Todd Shaner, Champion

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Thanks Rikk!
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Carlos Oliveras

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Thanks Todd for confirming and providing more detailed information about this issue, and thanks Rikk for forking my original reply into a new topic and filing it as a bug.
(Edited)
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Rikk Flohr, Official Rep

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Lightroom Classic 8.3 was released today and contained a fix for this issue. Please update to 8.3 and verify that you are no longer seeing the issue. Thank you!
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Todd Shaner, Champion

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Rikk, this issue is fixed in LR Classic 8.3 on my Windows 10 1803 system. Thank you very much!
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Carlos Oliveras

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I just did a quick test and yes, it looks like it's working as expected now. Thanks!