So I ask...
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.
I'm not sure if I'm wrong, but you can watch the video...
it is at the bottom right
anyway, is not that I need it right now, but I always wondered how they do this in films and such.