The alpha channel controls the transparency or opacity of a color. The alpha channel is what you use to remove the background from an image. A PNG image, for example, has an alpha channel that lets you set the background to be transparent.
alpha channel
The alpha channel controls the transparency or opacity of a color. The alpha channel is what you use to remove the background from an image. A PNG image, for example, has an alpha channel that lets you set the background to be transparent.
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