From the course: VFX Techniques: Building Replacement with After Effects

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Tracking static foreground elements

Tracking static foreground elements - After Effects Tutorial

From the course: VFX Techniques: Building Replacement with After Effects

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Tracking static foreground elements

We've tracked a new Billboard and also a brand-new sky, we're ready to see if there are other things we can use a 3DTracking data for. Let's turn on the street and see what problems we might have down the road. We need to hide the sky too here. Now the goal here is to eventually replace the center building, now there are few problems with that, one of which is the fact that there are foreground elements that block that building. So, we want to get the new building, which will be matte a painting, and in there we'll have to do something to get those cars and this lamp to stay in the foreground. Now one solution is to Rotoscope. Now rotoscoping can be difficult and it can also present problems where the edge of the rotoscope flutters and it looks like it jitters. Another solution instead of that is to mask out a single frame, a static frame, and then to track that using the 3D Tracking data; that way there will be no issues with the edge quality. Let's give that a try. Let's start with…

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