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Color difference key: lots of spill on talent's legs

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Eric ChardColor difference key: lots of spill on talent's legs
by on Jan 11, 2013 at 9:12:54 pm

If you go to this site:

http://www.hollywoodcamerawork.us/greenscreenplates.html

You can DL some great great screen practice sequences in HD, free.

So, I'm struggling w/the first, the talent in the green screen stage w/the camera dollying to the right. There's a lot of green spill on the talent's legs, and while I can pull a nice key on her, her legs wind up semi-transparent.

I've addressed this by doing the best key I can w/CDK, and then duplicating the layer multiple times to build up the opacity. AFAICT, this works fine. However, it feels bush-league.

IS duplication of a keyed layer a valid workflow?

Thanks.

++++++++++++++++
"Putting the HARM in 'harmonica' since 2005."
++++++++++++++++


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Dave LaRondeRe: Color difference key: lots of spill on talent's legs
by on Jan 11, 2013 at 9:18:58 pm

Yup, Hollywood Camera Work is a gem, that's for sure!

With the Color Difference Key, You may want to use AE's built-in Spill Supressor. Use the eyedropper to pick the precise shade of green to suppress.

Or you could use Keylight, which could help a lot.

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Dave LaRondeRe: Color difference key: lots of spill on talent's legs
by on Jan 11, 2013 at 9:36:39 pm

Darby Edelen also posted a nifty green spill removal recipe for AE about three months ago. Here's th link:
http://forums.creativecow.net/readpost/2/1027628

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Darby EdelenRe: Color difference key: lots of spill on talent's legs
by on Jan 12, 2013 at 12:57:04 am

[Eric Chard] "IS duplication of a keyed layer a valid workflow?"

Yes, but usually you'd do a separate key with different parameters on the duplicated layer to try and preserve the legs (or whatever part you happen to be working on) and then use a junk matte/mask to eliminate any issues that causes.

Most difficult keying takes some back and forth between keying and using junk mattes/masks on several layers.

Darby Edelen


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