Using Channels as Mattes in Natron

A short video explaining how to use the RGB channels of an image or clip as a matte for visual effects work. I get lots of emails asking about this process, hopefully this helps explain it. This is for Natron. I also show how to do the exact same thing in Blender in another video. See the full post here: https://openvisualfx.com/2020/08/30/using-channels-as-mattes/