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View Full Version : Comp cg shadows with live footage shadows

jtvergarav
02-20-2009, 03:42 AM
Hey, I thought I saw a thread about the same thing, but seemd to be like he was after some other thing.

So I ask...

http://i58.photobucket.com/albums/g274/Yeminio/Shadow-Comp.jpg

I made a fast comp in photoshop. I know is not hard there, but I don't really know about a good way to make the same in real life footage.

I've seen that in movies, they mix people shadows with cg, and they make it perfect. Is there any good work around about that? maybe blending them by difference, something like that. I'm sure masking isn't a good idea.

Here I have an example where seems like they didn't want that to happen, so it looked like this.

http://i58.photobucket.com/albums/g274/Yeminio/Exorcist.jpg

I'm not sure if I'm wrong, but you can watch the video...

it is at the bottom right

http://www.joealter.com/

anyway, is not that I need it right now, but I always wondered how they do this in films and such.

thxs!
zanian
02-20-2009, 10:10 PM
There are a few ways to do this:

Use the darken transfer mode (if it exists in your software) It will not darken already dark values.

And/or holdout the darker existing shadows with a lumakey.

If you have a bunch of cg shadows that overlap, combine them all before using them.
jtvergarav
02-20-2009, 11:38 PM
the darken transfer mode sounds interesting

I will try it out :P

THANKS!
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02-20-2009, 11:38 PM
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