From the course: After Effects CC 2021 Essential Training: Editors and Post
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Track mattes - After Effects Tutorial
From the course: After Effects CC 2021 Essential Training: Editors and Post
Track mattes
- [Instructor] While a mask allows you to control what's shown or hidden on a particular layer, After Effects also allows you to reference another layers transparency, or pixel brightness to control what is visible. A layer that controls another layers visibility in this way is called a track matte. And here in this movie, we'll explore how they work. So in this first example I have some numbers that I have going up in space and why, and basically I want to create a counter of sorts. Now you'd think that maybe with our masking tools I might be able to cut out a certain portion and have the rest of it kind of revealed. So let's go ahead and select our layer one and come over here to our rectangle tool and just draw a little mask around that layer. And when we preview it you'll notice that the mask is moving along with the layer, not what I intended. I actually want to keep my mask in place and just move the layers. So…
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