Results 1 to 5 of 5

Thread: Lighting Greenscreen for best Key

  1. #1
    Newbie Member
    Join Date
    Apr 2006
    Las Vegas

    Lighting Greenscreen for best Key

    Hey Y'all
    Anyone know the optimum ratio to light a green screen vs. Key light on subject when using VT 4 as the Keyer? I'm used to lighting the green screen about one stop below the key when I'm shooting for AE and others but haven't shot using VT 4 as keyer before. Any advise?

    Craig Finetti

  2. #2
    Paintball Video Geek billmi's Avatar
    Join Date
    Jul 2004
    Palm Bay, FL
    If you normally shoot DV, you'll find better quality hooking your camera to the VT, and recording as an RTV. DV compression throws away enough chroma data that it makes it more difficult to get as clean of a key.

    Other than that, in my experience it's not so much an issue of a ratio of the subject's brightness to that of the key, as it is making sure the background material is even (i.e. if it's fabric, no wrinkles that will cause shadows) and evenly lit. Also, that it is distinct in color from the subject (i.e. minimal green tones in your subject if you are green screening.)
    Toasting with NewTek since 1991 - Corinthian Media Services
    Riding Quiet on an Electric Ninja.

  3. #3
    LiveSet Making Machine joseburgos's Avatar
    Join Date
    Feb 2003
    If you have to use DV footage, then I suggest Serious Magic's Ultra.
    It is just awsome for doing greenscreen but do not render out of ultra in anything other than uncompressed or you will not get the alpha.
    I think this changed in Ultra2 but can not confirm.

    Take care,
    Jose Burgos
    NewTek Certified Trainer
    NewTek Certified on all TriCaster's
    NewTek Training & Certification Testing
    Twitter @NYTriCaster

  4. #4
    Registered User ted's Avatar
    Join Date
    Feb 2003
    Fresno, CA
    And don't forget a good backlight which will help separate the subject from the background. Maybe add a warm gel to the backlight also.
    Oh yeh, keep the subject away from the green/blue screen.
    Ted R. Ruiz Sr.
    Ad-Venture Video Productions
    Elite NewTek Dealer
    TriCasters, Most All Models
    Cameras-Mostly HVX 200's

  5. #5
    Avid Killer Dan Hong's Avatar
    Join Date
    Feb 2003
    Modesto, California
    We've been happy by lighting the green to 50% on the waveform. Keep the talent as far in front of the screen as possible, backlight with magenta gel, and record as rtv. I always record directly into the VT and check the project periodically by doing a quick key in the switcher. Even if you're going to do the final key in AE or something else, the RTV is the bomb. 95% of the time I end up just doing the key in VTEdit. We've done some ridiculous keys on some really bad backdrops and had great success.
    Dan Hong


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts