Two step keying and track matte to get rid of noise from Keylight.

[Todd Kopriva]

Read Mark Christiansen’s book, especially the chapter about color keying.

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Todd Kopriva, Adobe Systems Incorporated
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[Barend Onneweer]

It’s Keylight’s spill removal that can bring out the noise. Bypassing it (by setting the output of Keylight to Intermediate Result) can indeed introduce green edges. I use the spill killer in Red Giant Key Correct Pro and usually a bit of Lightwrap (in the same plugin-bundle) to get rid of the spill.

Raamw3rk – digital storytelling and visual effects

[Mitch Hardison]

Thanks so much guys! I’m trying now

[Sam Cucher]

Hello
Thank you for the helpful techniques you’ve described here.
I’ve been getting very nice clean masks using this two step/track matte approach, but I’ve run into a problem that I can’t figure out.
I’m trying to pre-render the masks without the background so I can add other effects and also use them in other comps but whe I pre-render them I only get a black screen. I’ve noticed that in my comp window, if I turn off the background layer my masked figure disappears (that is, the duplicate layer at the bottom that uses the alpha channel of the top layer which has the keylight). What am I doing wrong?

When I pre-render I’m using Animation RGB+Alpha in my output module to preserve the alpha channel.

I really need to be able to pre-render the masks without the backgrounds

Any help on this would be really appreciated.
Sam