Re: [FCP-L] Best way to Matte White Screen

No matter how you put it, you're painting the infamous lipstick on the
pig. White does not key. Period. It screens, it overlays, it does NOT
"key", it is a practical impossibility by definition. If it were a
mere question of "avoiding a color", then the colors blue and most of
all GREEN would not be standard as key colors. Look at a color wheel
or even video scope and you might catch why...

You will NEVER pull a usable matte based on WHITE unless of course
your foreground plate is *completely* black. Not without a massive
amount of garbage mattes that is, in which case you might as well roto.

- RK

On 25.10.2009, at 01:31, Robert Griffiths wrote:

> Not entirely... it works if you key back onto a white background and
> go with that as the look.
>
> Years ago, I shot interviews (waist up) with people in various
> locations with different crews on white seamless backgrounds. The
> goal was to create the "Mac vs PC" look. Green or blue keying at the
> time resulted in too much clipping and ringing to get a clean, natural
> look on white. So we shot them on white and softly keyed the various
> shades of white backgrounds out and keyed in a common white
> background. If you looked at the mattes, they were horrible with bits
> and specks you would never put up with in a normal key. But it
> worked. Strict rules: NO white clothing, buttons, silver jewelry,
> etc. One clown showed up in a white shirt under his jacket that I
> fixed with a holdback matte. Anything near white like eyeballs and
> teeth just seemed a little bit shinier that day. ;-)
>
> Of course, this was in the land of SD. I don't think I would try it
> in HD. Brett, if you are going to put your subjects on anything but
> white, you better start rotoscoping as Shane suggests.
>
> Hope it's a very short piece either way.
>
> Be well...
> ---
> Bob
> ------
> Robert Griffiths
> http://www.FireDancer.tv

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