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Chroma-keying


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#1 Niki Mundo

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Posted 10 July 2007 - 06:34 PM

I'm going to be chroma-keying several outdoor scenes and was wondering if I could just use the sun or a cloudy day whatever. The paint is really bright and as long as I have the actors far enough away I don't see a problem.. I'm shooting colour for the green screening work but the final released version will be in b/w so the colour differance shouldn't matter - right?
Thanks!
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#2 Micah Kovacs

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Posted 10 July 2007 - 11:37 PM

It should work beautifully. I've seen chroma-keying being done outdoors on both large and small scales and it always seems to turn out great - and no worries about trying to get an even light on the screen.

Here?s an example posted by Michael Morlan:
Posted Image
and here?s his page with more pictures
http://michael-morla...ourlove_vfx.htm
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#3 Ken Minehan

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Posted 10 July 2007 - 11:41 PM

yep. Thats right. As long as the screen is evenly lit and stretched out with no crumples fold marks you will be able to key out cleanly. If the sun is very directional you may get spill onto the ground in front of the green/blue screen. That means you may have to clean the shot before keying out.

http://www.digitaldomain.com/

Check out the above link. This is Digital Domain's reel for matte painting. it has several clips within that has outdoor blue screen lit with natural light. You can still see a lot of spill but was obviously cleaned up before keying out.

Hope it helps
Ken MInehan
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#4 Ken Minehan

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Posted 10 July 2007 - 11:44 PM

As for the Digital Domain link, click on it, then go to reels, then click on matte painting.

thanks
Ken
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#5 Gaffer

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Posted 11 July 2007 - 05:29 PM

Pinewood Studios home of the Bond Movies.
Has a chroma backing used with sunlight approx 70yards by 15yards high ( not too sure check it out via Pinewood studios)
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Rig Wheels Passport

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Gamma Ray Digital Inc

Media Blackout - Custom Cables and AKS

Tai Audio

Visual Products

Technodolly

CineLab

FJS International, LLC

Aerial Filmworks

Paralinx LLC