Chroma Key or Hi-Key for white background

[Grinner Hester]

eewww dont let him do that. You can make the spil whatever color you want in post but you’ll not be able to create a proper back light.
Harsh is yer buddy in this case. He has no background to try to match. He should just offer what pops the most.

[Matt Slocum]

Thanks for all the input so far. This is what it looks like we’re going to do.

We decided we wanted more people on the final shot, so we will be compositing the group with other shots with the same people wearing different clothes to make it look like a very large group. So we are going to shoot on a large greenscreen. We are going to put a slight (1/8 or less) magenta on their backs for rim light. The purpose is not spill correction, but to give a cleaner color separation on the edge. It will be slight enough to not be noticed by the eye, just the camera/keyer. Don’t know if it will really make a difference, but it makes the gapher and producer feel better.

Yes, the people are going to be carrying gray cards with another color on the back.

~Matt

[Jeremy Garchow]

[Matt Slocum] “We decided we wanted more people on the final shot, so we will be compositing the group with other shots with the same people wearing different clothes to make it look like a very large group.”

Then green I guess it has to be. That makes your decision easier, but perhaps your work a bit more complicated. Either way, it’s going to take some manipulating in post. You should consider getting an ioHD (if you use FCP) and doing on set captures to do small and light test keys/composites.

[Matt Slocum] “Yes, the people are going to be carrying gray cards with another color on the back.”

Make sure they aren’t picking up much green reflection, or put tracking points on the corners of the posters in case you need to track them out and replace them later.

Sounds like fun, man! Break a leg out there…

Jeremy