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Cast shadow from keyed footage on CG environment

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Joakim Norberg
Cast shadow from keyed footage on CG environment
on Sep 25, 2009 at 5:27:53 pm

Hi.
I got this keyed RED-footage of a woman running in slow motion while the camera is moving. The footage is camera tracked and imported into AE. So i got a camera setup that matches the footage perfectly.

How can I use the built in light system in AE to cast shadows from the woman to the cg environment? If I turn the footage into a 3D-layer with the orient towards camera on, the camera solve doesn´t work anymore.

Is there a solution for this, or another teqnique i can use? Im confused.



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Dave LaRonde
Re: Cast shadow from keyed footage on CG environment
on Sep 25, 2009 at 5:39:02 pm

If this CG environment is 3D, I'd take the keyed video into the 3D application, and let the shadow fall naturally on the 3D objects.

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


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scott novasic
Re: Cast shadow from keyed footage on CG environment
on Sep 25, 2009 at 9:49:38 pm

not sure why you would need to use the 3d camera for this. I would use any number of shadow techniques, given that you have a mask. which is the hard part with live action content

SuperNova
Animation & Visual Effects
Scott Novasic
Los Angeles Ca
web:http://web.mac.com/finaleffects


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Joakim Norberg
Re: Cast shadow from keyed footage on CG environment
on Sep 28, 2009 at 6:36:41 am

This is what i got:

- Footage that include a woman running in slow motion and a moving camera.

- Tracked and solved 3D environment exported into AE. (flawless)

Now i want to add the environmen, in this case just a floor.

My problem is to get shadows from the actor on the floor i created in AE.


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