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Best way to light green screen floor
This is a basic model of the green screen im about to make the light setup for. The lights in the model is florescent and the positions of them is calculated to spread an even light on the full screen. Don’t mind these lights.
https://www.joelarvidsson.com/Videostudio01.jpg
https://www.joelarvidsson.com/Videostudio02.jpg
https://www.joelarvidsson.com/Videostudio03.jpgI want to light the walls seperatly so that I can seperate my subject and the walls lightning. What kind of setup would you choose for the walls? I thinking of florescent light of some kind targeting the walls from the roof.
But the biggest problem is when the floor is going to be i the shot. How would you light it? How can i light the floor in the best way to minimize spill and hitting my subject?? If i have lights from the roof pointing down to light the floor it will be picked up in the subjects reflection. So i thought if putt upp a cloth the diffuse the light it would be good. I was thinking of having a dimmer to controll the light of the “roof softbox” to controll the intensity of the light and to controll the spill. I have read that you should never use a dimmer in a green screen setup cause it mess up the color temperature of the screen.
Any thoughts??? -
3 Replies
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A few points:
Most fluorescents won’t dim. The ones that will (Kineflo, Lowel, etc.) maintain color temperature. If you are going the DIY approach, don’t bother with dimming. Just add or subtract fixtures to get the light level you want, and be sure to use tubes with a CRI (color rendering index) of 90 or better. Look at the post archives on cinematography.net for some lighting solutions.The one shoot I did with a 2-walls + floor chroma setup used a large (about 1/2 the floor area) diffusion screen below the toplights.
Other suggestions: mask off every bit of green you don’t need with black duvateen or similar, on a shot-by-shot basis. Spill is a killer. Plan on about 50% more time in post for wide shots that include the floor; some rotoscope work is almost unavoidable.
-jeff
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Went over this ahem- elsewhere on the web. Green floor is a bad idea- bounces all the green spill onto your subject.
Noah
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It is to be avoided (chroma floor). But sometimes necessary. An alternative if your talent does not move much is to put them on a raised chroma platform. Then maybe you only need 4’x4′, or 4’x8′ instead of the whole floor.
Pix of an example:
This can greatly reduce spill.
-jeff
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