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Keying problem

PostPosted: 03/9/2016, 9:00 am
by PianoArtist
I'm looking for help on keying blue screen background. The background is actualy a clear sky, but the color is not quite blue, it's a little bit desaturated. In the shot, we see actor facing the camera, and there is a bunch of details of his hair. The problem is keying, but keeping those little hairs, without harsh edge. I'm sending a screenshot of that part in my attachment.

The Keylight (1.2) doesn't work so well. Is there other way of keying this background more efficiently?

Re: Keying problem

PostPosted: 03/9/2016, 11:31 am
by Grunt360360
try using color key, if that doest work and your really desperate try rotoscoping.

Re: Keying problem

PostPosted: 03/9/2016, 12:36 pm
by plae57
Did you try to create one or more procedural mattes from one of the color channels? I copied your image into Photoshop and created a good matte off the blue channel. You can so the same in After Effects. Sometimes the best way to key is to not use one of the built in keyers.

If you are unsure what I am talking about there is a good tutorial here: https://www.youtube.com/watch?v=RcPyfaoEyd0

Optionally use a selective color effect to pump the blue in the sky before you use a keyer.

Re: Keying problem

PostPosted: 03/9/2016, 6:33 pm
by PianoArtist
Thank You really much, this helped me a lot!

Have a nice day!

Re: Keying problem

PostPosted: 03/22/2016, 11:46 am
by ivanparas
The Rotobrush sounds like a good solution to your problem. It works pretty well with fine/blurry elements that need to be rotoed. Make sure and look up a tutorial that goes into using the Refine Edge tool as it's what you'll need to roto the hair.