creating alpha masks

H
Posted By
hotquietday
Dec 2, 2003
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547
Replies
1
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Closed
Hi,

I’d like to create an alpha mask for a specific color. That is, photoshop automatically provides masks for red, green, and blue. What if I wanted to create a mask for a specific color, like R=254 G=242 B=144. Essentially, instead of white being the base for fully exposed and black being fully masked (grayscale mask), this other color would be fully exposed, and white would be completely hidden. Is this, or something like this, possible?

Thanks,
hotquietday
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T
tacitr
Dec 3, 2003
I’d like to create an alpha mask for a specific color. That is, photoshop automatically provides masks for red, green, and blue.

Those aren’t masks; they’re channels. You’ve got your terminology a bit confused here.

What if I wanted to
create a mask for a specific color, like R=254 G=242 B=144. Essentially,
instead of white being the base for fully exposed and black being fully masked (grayscale mask), this other color would be fully exposed, and white would be completely hidden. Is this, or something like this, possible?

It’s hard to understand what you are after, as you don’t seem to be using the right terminology. I think what you want to do is create an alpha channel, assign it to a color (you can do this by double-clicking it in the Channels palette), then view it and RGB at the same time–is that correct?

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