Advanced Keying Breakdown: ALPHA 1.3 Channel Math / Combining Keys

0:00 Intro, RGB channels
6:00 Luminance
8:37 Adding all channels
11:39 Adobe After Effects Matte technique
16:21 Channel math summary
20:02 Combining Mattes with Keymix
23:20 Isolated mask Post-Grading

In this video I break down the basics and fundamentals of what keying is and how you can make keys from individual channels.  I also talk about using keymix to combine different keys, and how to isolate only certain areas of the key to adjust with a post- grade.

Here is the Channel Control tool I showed in my tutorial:
ChannelControl_v05_

Here is the Adobe After Effects Matte Technique Gizmo:

AE_Matte_v01_

 

My next video should wrap up the alpha section, stay tuned.

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2 thoughts on “Advanced Keying Breakdown: ALPHA 1.3 Channel Math / Combining Keys

  1. Just have to say: your advanced keying series is an absolutely wonderful learning resource! Eagerly awaiting the next installments.

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