The elusive alpha channel remains one of the most misunderstood yet
powerful tools in Photoshop. Alpha channels are collections of
luminance data that control the transparency of an image, and they
inform just about every aspect of Photoshop. Selections, layer
boundaries, the Quick Mask mode, layer masks, knockouts, and the
Channels palette all rely on alpha channels. In Photoshop CS3
Channels and Masks, award-winning author and Photoshop expert Deke
McClelland taps the vast capabilities of popular tools like layer
masks, luminance blending, and paths. He also takes on many little
known but very useful features, including Calculations, blue-screen
masking, high dynamic range, and displacement masks. Plus, Deke
teaches how to select and composite highlights, shadows, clouds,
fabric, feathers, glass, flames, lights, eyes, and all kinds of hair.
Exercise files accompany the tutorials.
Book Details:
Edition Info: CD-ROM; 2008-01-09
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