Make Alpha Key

the BCC Make Alpha Key filter creates a new alpha channel from one of the existing channels in the image and then applies levels and gamma correction to the new alpha channel.

The built in PixelChooser, with integrated mocha planar tracking allows for greater control over which pixels are used to create the alpha channel. You can create many useful effects by making a Full On (completely opaque) alpha channel and using the PixelChooser to control which parts of the image key out.

To learn more about this filter, and see a breakdown of the various controls, please click here.