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Adobe Photoshop: Alpha Channels

Chapter: Compositing Tools and Techniques

Topic: Compositing Tips or Shortcuts

In the Photoshop tutorial, Richard Harrington takes a look at making an alpha channel based upon the luminance in an image. Alpha channels allow you to store transparency in a graphic and transfer that transparency to another non-linear video editing program or compositing application and key or composite in real time.

http://library.creativecow.net/articles/harrington_richard/photoshop_alpha_channels.php

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