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Old September 28th, 2011, 09:07 AM   #1
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AE Shadow problem with live action footage agains Green Screen

Hey Guys,

i have a shot of a guy walking shot against green screen. i'd like to replace the background and floor and cast some nifty shadows on it.

I've set up a white solid, made it 3D, then rotated it flat on the x axis and then adjusted the camaera to match the background image. then i've aligned the y position of the greenscreen footage so that it sits right on top of the white solid. then i've added a light and enabled the shadows in AE but for some reason the shadows that are being cast in AE do not originate right where the foot of the actor is, but a few pixels away.

is there a way to prevent this?

thanks!
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Old September 30th, 2011, 01:57 AM   #2
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Re: AE Shadow problem with live action footage agains Green Screen

For shadows, I usually duplicate the keyed layer, turn the layer to black and skew & rotate it to make it look like a shadow. Works every time and is very simple.
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Old September 30th, 2011, 04:27 AM   #3
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Re: AE Shadow problem with live action footage agains Green Screen

that's a neat trick! i'll try it today!
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Old September 30th, 2011, 08:31 AM   #4
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Re: AE Shadow problem with live action footage agains Green Screen

That's the way I do it too. Much easier to control.
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Old September 30th, 2011, 11:24 AM   #5
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Re: AE Shadow problem with live action footage agains Green Screen

Hm but you cannot have shadows from objects reflect on other objects or dynamically change the shadows by moving a light :(
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