Comments

farss wrote on 12/23/2009, 11:55 AM
Apart from the lighting, the matched camera moves helps sell the shot.
Even with a static shot matching focal length seems to be the trick to me.
Consider this. Real shot, no CK. You put a 1 stop silk over a subject standing in a full sun scene. Clearly the lighting of the subject doesn't match the background but we still buy the shot because it is real. Perspective of foreground and background matches.

Alternatively shoot a BG plate with a 20mm lens. Key in subject in studio shot at 100mm. Even if the lighting matches perfectly there's a visual connundrum.

Bob.
Jay Gladwell wrote on 12/23/2009, 12:23 PM

I agree, but if the lighting doesn't match, everything else is for naught.

gjesion wrote on 12/23/2009, 3:13 PM
I always find it interesting how good the keys are given how uneven the lighting of the screens often is. I always have trouble if there are ANY bright/dark areas on the screen (shooting HDV). Is it that easy using film? Or are they shooting 4:4:4 video?

Regards,
Jerry
farss wrote on 12/23/2009, 6:44 PM
"Is it that easy using film? Or are they shooting 4:4:4 video?"

Those two choices are pretty much the same thing.
Really good (expensive) keying software can help. Seeing as how the work is high value paying people to spend lots of time to get it pixel perfect by hand, frame by frame if need be is viable.
Note that at least some of it is set extension, that's much easier with the right tools as the edges don't move so masks can be used. Also the edges are relatively simple.

Bob.
richard-amirault wrote on 12/23/2009, 7:02 PM
I always find it interesting how good the keys are given how uneven the lighting of the screens often is. I always have trouble if there are ANY bright/dark areas on the screen (shooting HDV). Is it that easy using film?

A way to check how even the lighting on the green screen (before you actually shoot) is to turn on the zebra function of your camera and adjust the exposure until you see where the zebra shows up. Ideally, I would think, it would show up all over the screen at the same time. If not you have the option of adjusting your lights until it's as good as you can get it.