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Fan Productions Creating our own Trek canon!

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Old July 28 2014, 01:43 AM   #16
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Location: Maurice in San Francisco
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Re: Questions; Fan based studio/operations.

The green doesn't HAVE to be exactly the same color, but the bigger the variance in hue and brightness the broader the keying color settings have to be, potentially making it harder to pull a clean matte.

You need to get the green lit as evenly as possible and minimize shaodws and hot spots, as there is less color information in the light and dark extremes and, again, it's harder to pull a clean matte.

Cover or flag whatever green you can that isn't in shot to minimize bounce. If you see green bounce, try to figure out from what direction it's coming and try to use a flag to kill the reflection.

Cover any greenscreen on the floor unless it is in shot, again, to avoid bounce.

Have a big enough greenscreen so that your actors are far enough away from it to allow them to be lit separately of the screen (and, once more, to avoid bounce).

Avoid having actors in colors which have a lot of green in them, like teal or yellow-green.

You can use any color screen to pull a matte, but green is preferable in digital video because
  • green is more reflective than blue, then it takes less light to get a useable green backing than blue
  • the information in the green channel of a video signal is typically the sharpest, thus produces the cleanest mattes
* * *
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