Join Lee Lanier for an in-depth discussion in this video Motion tracking greenscreen, part of VFX Techniques: Crowd Replication with After Effects.
We have imported our first crowd footage, and we've used keylight to remove the green screen.…At this part, we are ready to apply some motion to these people as they're getting to move with the camera.…Now before I do that, though, I'm going to double check the edges just to really make sure they're looking good.…I'm going to zoom way in and take a look, and as it turns out, there's a bit of green line here.…So fortunately, I can go back to my green screen tool which is Keylight and take a…look at the options, and in fact, there's a great set of tools you can use to get rid…of this tiny edge of green.…One is a screen Shrink/Grow and one is a Screen Softness.…
If I adjust the Screen Shrink/Grow to -0.2, it erodes out the edge a little bit, and you…can also soften the edge, blur it out little bit.…Let's say I put that to 0.6, I get a little bit of a blur.…So that's looking better now. It's gotten rid of the heavy green edge.…Now, we can address the motion tracking.…We are going to use Transform Tracking tool once again with some slight variations.…
- Setting up your project
- Removing camera jitter
- Motion tracking CG renders
- Creating light effects
- Keying with Keylight
- Solving bad matte edges
- Rotoscoping green screen footage
- Color grading to match elements
- Relighting the scene
Skill Level Intermediate
1. Getting Started
Reviewing image sequences4m 13s
2. Tracking and Integrating Renders
3. Working with Greenscreen
4. Color Grading and Rendering
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