Alpha Channels 531
• Click the New Channel button .
To copy a channel
1 In the Channels panel, choose a channel from the list.
2 Click the Channel options button , and choose Duplicate.
3 In the Duplicate Channel dialog box, choose New from the Destination list box.
You can also copy a channel to an existing channel, so that the existing
channel is replaced. To do this, choose the existing channel from the
Destination list box.
Generating channels automatically
Corel Painter can automatically generate a channel based on the light and dark areas of
a number of sources, including paper, pattern, and clone source. For example, you can
create a selection based on the luminance values of a clone. You can also create a channel
based on a range of colors. These methods are similar to automatically generating pixel-
based selections. For more information, see “Creating pixel-based selections” on
page 549.
An image (left), the channels created using image luminance (middle), and
inverted image luminance (right).
To generate a channel based on luminance
1 In the Channels panel, do one of the following:
• To generate a new channel, choose the RGB channel from the list.
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