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Affinity Photo - Channels & Masks


Gauncer

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Hi, love Affinity Photo and all the hard work you guys have poured into the software. I have a few questions about Channels and masks. I have watched your video but I still seek information.

Frist off forgive me if these are simple issues, I have been working in Photoshop as a professional for over 20 years. There are techniques that are much like muscle memory for me with PS. I struggle in AP to get the result due to my lack of experience with AP. You know old dog new tricks, I want to understand Affinity better.

What is the definition/purpose the of the Composite Alpha? I don't see data in the channel, even though the RGB channels show their data.

Which leads me to my next question; How do I make an all 3 (RGB) channel selection? I am looking to get all 3 channel data into a single mask (luminosity mask). I would think the composite Alpha would be the place to retrieve that data. 


In the Channel Studio, there is a "Mask Alpha" that shows the mask I have selected in the Layer Studio. Is there a way to view this mask from the Channel Studio like when you option-click in the Layer Studio?  It would be nice to view any alpha with the option-click like Spare Channels.


Thank you for your help.

Gauncer

Edited by Gauncer
Corrected Terminology
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