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Dimensions of B/G for Green Screen
Hi,
I am shooting a webcast for a local newspaper. I am using the Sony HDV Z1 camera. I am a little rusty on green screens. The graphic designer is designing the background for a 8 x 12 green screen. He wants to know what size in pixels to make the file. I’m clueless. Can anyone help?
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1 Reply
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More pixels is always better. In this case, I say you want as big a file as you can handle, because when you shoot green screen and want to cut to a closeup from a wide shot, it is nice to have the replacement footage be big enough that you can zoom it in a little without creating visible pixelization.
This sells the viewer that the background is real, because the subconscious expects to see a shift in the width/size of the background when you cut to a closeup. Chromakey backdrops that remain at one size, while the talent in the shots changes, are a dead give-away.
The larger image also allows for control in x and y of the relative positions for best composition.
As to how big to make a green screen backdrop, you really only need it to be very slightly wider and taller than the subject you want to show: the rest you remove in post with mattes and garbage masking.
Don’t forget to make a green floor if you want real full-body shots.
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