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Key In and/or Repeating Balls

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Arrien ZinghiniKey In and/or Repeating Balls
by on Jun 9, 2010 at 11:38:06 pm


Is there a way to use color key (or Keylight, etc) to select a range of color you want to remain while removing everything not in the color range?

I have a bunch of blue balls I want flying around a space. I only shot so many, so I want to duplicate just the balls for the appearance of more. Whether I can manage to key blue in or not, I feel as though there has to be a simple way to do this.


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Tudor "Ted" JelescuRe: Key In and/or Repeating Balls
by on Jun 10, 2010 at 6:04:48 am

You can key out a color and then just invert the alpha thus created.
As far as multiplying the balls, once you have them with an alpha, all you need is basic compositing.

Tudor "Ted" Jelescu
Senior VFX Artist
Bucharest, Romania

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Arrien ZinghiniRe: Key In and/or Repeating Balls
by on Jun 10, 2010 at 5:36:20 pm

I figured this out. I used a Difference Key and selected a few of the colors in the area surrounding the object, which thankfully didn't include any colors close to it. Only took three eyedroppers to clear out everything but the balls.

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