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Successful difference key?

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Matthew Beall
Successful difference key?
on Apr 13, 2017 at 7:07:51 pm

I have a project coming up where I know I will be replacing a lot of signage in a busy airport.
We can not stop travelers from their normal paths, nor can we put up green/blue over the existing signage to pull a key.
I'm hoping to avoid tons of rotoscoping if at all possible. If I can get a clean background plate, is there any chance of pulling a successful difference key? The few times I have tried it I was not impressed. Other alternatives?


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Dave LaRonde
Re: Successful difference key?
on Apr 13, 2017 at 10:50:22 pm

I for one have never seen a convincing-looking difference key. I've shot footage in a studio on a locked-down camera and I haven't gotten one to work. I've shot stills (with far larger pixel dimensions than video) in a studio on a locked-down camera and haven't gotten one to work.

The only time I've seen a good-looking difference key were in old AE user manuals (remember those?) that illustrated how the effect was supposed to work. I bet they faked it in Photoshop.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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