From the course: After Effects Compositing: 4 Color Keying
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Conceal matte lines with an edge matte - After Effects Tutorial
From the course: After Effects Compositing: 4 Color Keying
Conceal matte lines with an edge matte
At this point I have a matte that has no chatter, but it is simply too choked. If I play it in motion, you'll see that there's just a lot of missing detail. And in fact, you can see that also by comparing the original with the keyed version. So I'm actually going to back off my adjustment and show you how to create an edge matte that allows me to blend the background and foreground together. The first step here is just to eliminate this levels effect that is what's choking that matte. I'm going to get rid of Channel Blur as well and just go back to the original extract. So here I'll lower the white point and then, increase the amount of softness so that it spans that entire spike that you see. And that's the sky in the background. If I solo the layer, you can clearly see we've got pretty strong matte lines. My next step is to duplicate this. And I'm going to do it in a way that may not be necessary, but I'll copy it with property links and paste it up at the top. Now that means that…
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Contents
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High-contrast mattes: Introduction57s
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Create a luma key with Extract3m 27s
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Set up a simple sky replacement in 32 bits per channel2m 38s
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Improve detailed edges with Refine Soft Matte3m 29s
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Feather edges with Channel Blur3m 26s
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Conceal matte lines with an edge matte4m 37s
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Expand and contract a luma matte with Minimax2m 9s
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