Mask Vertex Expressions plus Grading

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    How to use expressions to finally access mask path vertices in AE
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    Expressions: http://workbench.tv/tutorials/2017-11-10_MaskVertexExpressions/
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    This video was sponsored by VideoBlocks. And because of that we have some nice footage to work with. And we’re using that footage to take a quick look at a feature I’ve been dying to have in AE since at least 2005—mask vertex expression access! It’s finally here in CC 2018!
    I’ve needed this so many times, from locking other layers to masks to generating connecting lines on the fly without having to resort to scripts or a bunch of Beam effects. Here, we’re using it to draw triangles on our footage. But combined with After Effects facial tracker and some setup, you can make polygonal faces that move with real footage, or whatever you can think up. I have some other ideas in the works, but I’m going to need some time to experiment. Until then, take this technique and run wild! Also, if you watched the grading section, I’m sorry I said “little bit” about a bajillion times. I’ll keep it down next time. I just didn’t realize I was doing it.

    Code is up on the website. Check out the Expressions link above in case you missed it!

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