I have more than 20 years operating a camera and now and then someone turns to me to DP some project or as a second unit DP.
Today was one of those days when some director came to me asking to DP a commercial. I said yes even though it's going to be a first time DPing on a green screen, so I'm a bit nervous.
The set has 43 meters (roughly 150 feet) by 18 (59 feet). The lighting grid is 7 meters (23 feet), off ground and they have all lighting requirements I can ask for.
The set will be dress by the Art Direction with some walls where a couple of guys will be Parkouring.
The action will be shot 60p and 150p, so about 1 1/2 stop difference.
My initial thoughts are to put a bunch of space lights in the grid to light the green screen evenly. They will be on dimmers to dim them down for 1/120 and up for 1/300 shutter speeds.
Then backlight/Kick the action with HMIs through frame diffusion (I was thinking LEE 250 to give it some edge), and bouncing that light into the actors with Ultrabounce.
Questions for the experienced in these situations out there:
Hang the space lights only behind the action or also above it to raise exposure levels?
How can I avoid green spill on the action? Push it as must as possible from the green screen? I believe that the Art Direction will also be greening the ground where the fake walls will sit. Use Minus green on the HMIs to separate the action?
How many stops difference have the green screen to read comparing to the bounced light on the actors or even the edge/back light on them?
I'm under the impression that this will be shot on a Sony F55, S-Log3, so ISO 1250 base exposure.
Any suggestions are greatly welcome, even on different lighting approaches.
Thank you in advance.
Edited by Alexandre de Tolan, 05 February 2016 - 06:06 PM.