Photoshop: Problem with a and b channels in Lab adjustment layer

  • 1
  • Problem
  • Updated 8 months ago
  • Solved
  • (Edited)
In Photoshop CC (all available updates installed) whenworking in Lab mode and creating a Curves adjustment layer, changes to the a andb curves in the layers panel have no effect on the image (changes to the Lcurve work as expected). 

Making Curves changes to the image directly (viaImage>Adjustments>Curves) works as expected.  Also, Levels adjustment layers workcorrectly. 

 Anyone else have this problem?

 Thanks, 
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Hart Kannegiesser

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Posted 8 months ago

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eartho

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No problems here. Which OS?
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Hart Kannegiesser

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Mac OS Sierra 10.12.6
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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I'm not able to reproduce on macOS 10.12.6
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Hart Kannegiesser

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"Problem" resolved, I caused it myself.  I have an action to create a curves adjustment layer which by default puts the new layer into Luminosity blending mode.  If I put the layer in "Normal" mode everything works as expected.  Thanks for the responses.