Using Channels as Mattes

Ever since posting my Natron mural tutorial, I’ve gotten lots of questions about the process of using the color channels of footage as an alpha channel. It can definitely be a confusing technique, especially if you’re new to compositing. I thought it’d be a good idea to make a short tutorial going over that process specifically.

A channel matte in Blender

I did the same tutorial in both Natron and Blender, so whatever you’re more comfortable compositing in, you’re covered. Both videos are below.

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