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How to create Luminosity Masks

Updated: Sep 16, 2021

As promised, here is how to create all the Luminosity Masks manually without using my “GreyChow LM action pack”.

*Correction: To subtract a channel, it should be “Cmd + Opt + Click” on Mac not “Cmd + Alt + Click”.


To understand the basic of the Luminosity Masking and Exposure Recovery:

If you want to download the “GreyChow LM Action pack”, you can get it here.

GreyChow LM Action Pack
Download ZIP • 134KB

Installing GreyChow LM Action Pack

To install the action pack, please perform the following actions

  1. Unzip the downloaded GreyChow LM Action file.

  2. Double click on GreyChow LM Action Pack.atn file, this will automatically open up Photoshop and install the Action Pack.

  3. To view the Action Pack. In Photoshop, go to Window > Actions.


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