Can I Replace This Sky?

[Vince Becquiot]

Hi Greg,

If you have CS5, that would be a perfect job for After Effects’ Rotobrush

Vince Becquiot

Kaptis Studios
San Francisco – Bay Area

[Craig Whitaker]

Yes you can, but how much time you spend on it will make it or not. Another guy at work just did something like this in Nuke for a feature we have in right now. It’s a 340 frame shot. I can tell you that his final comp has significant amount of roti along with many different keys. Shots like this need every trick in the book and I can’t imagine getting an acceptable result with just one operation. I’d make several garbage mattes and then start with a few keys. Good luck!

[Ann Bens]

Rotobrush is a good option.
For the older versions of AE this might still work: https://library.creativecow.net/articles/kramer_andrew/sky_replacement.php

[Toby Gale]

you could use the ultra key feature found in premiere pro, effects>keying>ultraKey
use the colour selector to select the sky.

i like ultra key because it has alot of options for poor keying material however it usually works it out by itself.

for a quick fix you could colour grade the sae footage so they sky is the colour you want and put the old clip on the top layer with ultra key revealing the colour corrected sky.

not exactly elegant but should work. otherwise i could have a go at removing the sky with NUKEV6 for you im practising advanced keying.

Hope it helps

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