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Hour 12. Using Masks > Applying Masks

Applying Masks

Masks can hide either a selected object or the background, and can be opaque or semitransparent. If the mask is totally transparent, it isn't masking anything. Masks—and channels, which you'll learn about later—are actually grayscale images. An opaque mask is black, a 50% transparent mask is 50% gray, and so on.

In Figure 12.1, I have a nice photo of a lighthouse that was shot on a cloudy day. (It's somewhere on the south coast of Nova Scotia, although I'm not sure where. Perhaps a Canadian reader will enlighten me.) To my eye, this would be more interesting if I could do something with that sky. The lighthouse and woods are accurate for color, as nearly as I can remember, so I don't want to change them. If I select just the sky, I can work on it without affecting the rest of the photo. Of course, that wire will have to come out at some point, but that's a job for another hour.


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