Once you know all about masking and adjustment layers, you are ready to move on to Track Mattes!
A track matte is an invisible layer that is used to control the opacity of the layer directly beneath it. In essence, they replace the alpha channel of the layer they are being applied to.
Let's assume you have 2 layers of footage on top of each other. The top layer will, if its opacity is set to 100% and you have not applied any masks, obscure the layer below it entirely.
However, you can add a track matte to the top layer to control its opacity. First, you will need to add a new layer directly on top of the layer you want to use it as a matte for. This layer can be anything you want: text, shapes, a video or another composition. In the following example I simply added a few shapes onto my new layer:
Great work, mate. I had some questions and now they are all gone thanks to your wonderfully explained article
Thank you so much for this tutorial.
I was confused with the concept of Luma and Alpha
for quite a while, your tutorial just explains everything
I need to know. Thanks again. Great tutorial. Love it.
This was great. Very well explained - thanks!
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Thank you so much for this tut - cleared things up for me, I am printing this out and hanging on my wall :-)
you can send for me footage in example, please!
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I really appreciate the energy you put into your tutorials. They are fun to watch. Thanks.
thanq so much