layer mask from existing grayscale image

S
Posted By
slipster70
Aug 20, 2004
Views
860
Replies
2
Status
Closed
I’m sure this has been asked before and I just can’t find it.

All the tutorials on the web tell how you can create a layer mask by clicking the "quick layer mask" button then painting with the brush in either black or white to reveal / hide the layer beneath. Fine.

What if I have a pre-existing grey-scale image that I want to be the layer mask? So, 3 images total, the grey scale one to go between them and act as the mask. How would that work?

Thanks. I did search the web with little success for this particular question.

slipster70
Related Tags
exist grayscale image layer mask

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Y
YrbkMgr
Aug 20, 2004
In theory, drag your grayscale image onto your image. Ctrl-Click that grayscale layer. It is now selected. You can save it as an alpa channel and apply that mask, you can modify it with QM and then save it, or you don’t have to save it at all. But if you save it as an alpha channel, you can delete the layer if you like, or you could turn it off.

I don’t even begin to pretend to know what you’re wanting to do with the "sandwich" idea. But the above would be one way…

Peace,
Tony
PC
Pierre_Courtejoie
Aug 21, 2004
You can copy the greyscale image (CTRL+A, CTRL+C)
Add a layer mask to the layer that you want to hide with the alpha, then ALT+click the layer mask thumbnail to target it.
Paste your image. (CTRL+V)
Click on the layer’s thumbnail to return to normal mode.

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