View Full Version : Techiques for sky replacement

03 March 2003, 03:13 AM
Does anyone have some trade secrets on sky replacements? The footage I'm dealing with is relatively simple. It was shot on a beach on a greyblue day so the background is reasonably flat. I was wondering what are some moves you all know for that. I was thinking keyer, difference matte and matte tools. But I'm new at all this so I ask.


03 March 2003, 10:08 PM
Maybe mask+track the background out..? Then replace the current background with a 3D generated one.
Im a compositing n00b...thats what i think..:)

03 March 2003, 11:29 PM

You can try to key them out, or generate a matte for the sky, like Bronzilla said you can also mask and track but I think would be a litlle more comlpicated. The technics may vary according to the footage scene.

Maybe you could post a frame for us, this way we can see what you are talking about and give you a better help.

See Ya!:thumbsup:

04 April 2003, 09:31 PM

I have some quick PS comps up top and one completed shot down at the bottom. (before the DIVX animation).

all of this is for a friend's film. Lots of work for no money.

04 April 2003, 06:05 PM
You should be able to get a good key from that sky. depending on what you shot it with. If it's DV you might want to read some of the other posts about getting good keys from dv footage.

Alan Bell

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