Chroma Key Help Please!!!

[Fcollins]

:help: Hello everyone we got our Tri Caster last year. Here is my setup and my situation.
At my school I have a room that is the studio. I had our maint. staff paint the back wall with key green paint. I have soft umbrella lights and some clamp on lights that I use to light my talent and I use floor flood lamps to light the back wall. I am using a GL II - 3 CCD camera for our shoots.
The problem is that whenever we try and key in our green we have such a hard time. Here are some of the issues we face.
1. When the talent turns their head one side of their face goes transparent.
2. There is a green shadow around the person no matter what I try. I think its called spill and I have tried to adjust it out but no go.

I have tweaked the adjustments and have spent countless hours trying to get this to work correctly. I think I have read everything on the net about lighting and I have tried just about everything I can think of.

Has anyone setup a studio that works with green screen. I need any tips or suggestions I can get. This was a big jump for our school district and at this point I am not very happy with the outcome of the unit.
Thank you.

[Paul Lara]

Hi,
Here are some key points for you (no pun there)


Move talent as far away from the key wall as is practical
set up a backlight with amber gels; this will counteract the spill, which is green light splashing off the back wall
Make sure you're using TriCaster's S-Video output, not composite

[Tarheel Cougar]

We've found using flourescent lighting to backlight the green works really good because its very even and no hot spots. Also try Paul's tips.

[Fcollins]

:agree: Thanks for the Reply! We have our talent about five feet away from the wall. I will try the extra lighting tip. Right now I am lighting it with flood laps, but that may be too hot the way it sounds here. This amber back light, do you know where I could buy these at. I am not sure what an amber light is.
Thank You!!