Best way to light green screen floor??

E

Eljoninjo

Well-known member
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.

http://www.joelarvidsson.com/Videostudio01.jpg
http://www.joelarvidsson.com/Videostudio02.jpg
http://www.joelarvidsson.com/Videostudio03.jpg

I 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???
 
Eljoninjo said:
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???
Click to expand...

Well as far as I know the color temperatre of the screen doesn't need to mach with subject's one. As long as the color of the screen end up being green.

as I told you in the other post try to light your talent enough to take out all the green spill and the n in post redoce the brightness of the final result.
 
I 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.
Click to expand...

Try to flag the light so they don't hit the floor and thus avoding unwanted light spill in the subject.
 
Or top light everything with a bunch of soft sources that may work just as well. Chinese lanterns, a matrix of the 200w 8U bulbs, or one big "fisher light" type source.
 
Eljoninjo said:
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.

http://www.joelarvidsson.com/Videostudio01.jpg
http://www.joelarvidsson.com/Videostudio02.jpg
http://www.joelarvidsson.com/Videostudio03.jpg

I 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???
Click to expand...

Hi Eljoninjo,

Ideally, you'll keep the illumination within about 1 f stop across your green screen area. There's a lot of ways to measure the delta, using a scope, camera zebras, using a Spot Meter (like the Sekonic L-508), etc. Adjust your lighting accordingly or consider better software (Ultra Serious Magic/Adobe). And hopefully you're floor isn't a reflective surface that will bounce green light onto the subject. If you're a serious student, you might want to consider this DVD (try downloading the demo):

http://digitalcinematraining.com/downloadoptional.html

Happy Trails, Michael
 
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