Fundamentals of Compositing, Tracking, and Roto Techniques in After Effects

by Bill Cassel on January 31, 2012

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Jeff Fos­ter wants to teach you every­thing he knows about work­ing with green screens, com­posit­ing, and roto tech­niques — which is quite a lot. He began the process of upload­ing the con­tents of his brain to our web­site with the suc­cess­ful Green Screen Work­shop series (The Setup and The Shoot), and con­tin­ues it with his newly released title Fun­da­men­tals of Com­posit­ing, Track­ing, and Roto Tech­niques. (This one in turn will be fol­lowed in a few weeks by Advanced Com­posit­ing, Track­ing, and Roto Tech­niques with After Effects.)

In Fun­da­men­tals of Com­posit­ing, Jeff teaches you the basics of green screen com­posit­ing and set­ting up a stream­lined roto work­flow with After Effects and a Wacom tablet. I recently asked him to answer a few ques­tions in honor of its release.

Q: Did you your­self learn any­thing in the process of cre­at­ing this course?

A: While the bulk of the con­tent in this title is com­prised of every­day work­flow tech­niques I’ve used for years, there’s always some­thing that I stum­ble upon that is a skipped step or a new/​faster way to get around a prob­lem. When I pro­duce each les­son, I do a full run-​​through of every project a cou­ple of times; with each pass the results get bet­ter and bet­ter, and I end up adding a few fin­ish­ing touches to pro­duce a bet­ter end result.

Q: What is the most com­mon prob­lem that peo­ple will no longer suf­fer from after com­plet­ing this course?

A: I think if you are doing a lot of roto work, the tips on using the Wacom tablets to your advan­tage and putting the key­board aside will not only speed things up for you sig­nif­i­cantly, but also help with fatigue. I’m also cer­tain that the motion track­ing lessons will help users under­stand what kind of footage is really “fix­able” and hope­fully help them encour­age bet­ter shoot­ing on the front end. It’s so easy to just assume that you can “fix it in post” while you’re doing sloppy hand­held shoot­ing, but this isn’t always the case.

Q: What can peo­ple look for­ward to in the sec­ond part of this series, Advanced Com­posit­ing, Track­ing, and Roto Tech­niques with After Effects?

A: That’s when it really starts to get fun. I go into more advanced tech­niques for problem-​​solving green screen com­pos­ites and more roto tech­niques. I also show how to do match-​​moving and track­ing with Mocha for AE and matte paint­ing tech­niques. I even give a few tips and tricks on alter­ing light­ing in your scene and mak­ing the com­pos­ited objects look more believ­able. The two titles really go well together.
For a quick but pow­er­ful exam­ple of what Jeff’s talk­ing about, check out this free video from Fun­da­men­tals of Com­posit­ing, Track­ing, and Roto Tech­niques with After Effects where you’ll see how to get the best results when extract­ing and com­posit­ing a green screen shot using Key­light in After Effects.

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