PS - Edit alpha channel per layer


#1

I need to be able to edit the alpha channels on different layers separately, but it appears they are linked. If I change the alpha on one layer it will change it on the other as well. I can edit the RGB on both layers separately, but not the alpha. Any way to do this without creating separate PSDs?


#2

In Photoshop there is no direct method to affect the transparency (alpha channel) of a specific layer. There is a way to convert the transparency to a layer mask, though: Layer->Layer Mask_>From Transparency. That allows you to work on the “alpha channel” per layer. When you are finished apply the layer mask.

A more direct approach is delivered by Photoline: the eraser tool works directly on the transparency/alpha channel, and the drawing tools allow the user to draw in the A (Alpha channel) only. Aside from that, like Photoshop, creating a layer mask based on Alpha is pretty much identical to the process in PS.

Unfortunately, Photoshop does not offer tools to directly draw in the A channel.


#3

I kinda thought so. Thanks for the layer mask tip.


#4

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