Using the PixelChooser to limit where Boris effects occur within the frame.
- [Instructor] Normally, when you apply an effect to a layer in After Effects, the effect occurs everywhere in the frame. Now, you can limit that by using some of the built-in masking tools, or creating some type of matte. However, if you use Boris Effect, there's a built-in pixel chooser that can limit how the effect works. It's very convenient. Let's give that a try. Once again, new project. I'll import some new footage this time, Import, File, I'll use the jogger footage that's included in the chapter one set of folders.
Bring that in as a sequence, drop that on a timeline to create a composition, and here is our library footage of a jogger. So, let's say I want to create a effect but limit it to a certain area. For example, maybe I want to disguise her face, as if it's a video where we don't want to see who she really is. Well, a great effect for that would be, say, Mosaic, which pixelates the layer. If I use the Boris mosaic, it will have the built-in pixel chooser to make this task a lot easier.
Let's give that a try. With the layer selected, I'll go to Effect, Stylize, Mosaic. When I apply that, it pixelates the entire image. Now, before I apply PixelChooser, I want to adjust these pixels so they're nice and square. I'm going to turn off Lock to X, and adjust the Pixelate X and Y. Let's say 30 for X, a little bit bigger in Y to make it more square, 40.
Looks pretty good. Okay, so now on to PixelChooser. All of Boris's effects carry this towards the bottom. Here it is, PixelChooser. It's off by default. I can turn that menu to On, and it'll begin to work. However, we don't see any difference here yet. What I have to do is, choose what type of mask or matte to apply. If I go down deeper, there's the PixelChooser/Mocha rollout. I'll expand that. Inside that is a Mask rollout, expand that also, and here is a mask shape I can turn on.
Off by default. If I change that menu to a shape, I'll see it. Let's say Circle, and there we go. Now, that mosaic is limited to that area, even though I only have a single layer, and no traditional mask. It's in the wrong place, but I can grab the center target and click on her face. It moves over. I can also turn on the heads-up display for the effect, and see a square that controls that mask. Now, these circles are the standard heads-up display that control the main properties for that effect.
The square, however, is the mask. So, I can scale it down by grabbing the edge, and, once again, I can position by gabbing the center, in this case, until it's in the right spot. Now, the transition from effect to no effect is quite hard, so I can go back down to the Mask properties, and adjust the built-in Feather. Let's say 10. Now it's a bit softer on the edge. I'll turn off the heads-up display so we can see this better.
There we go, and there's our effect. Now, it's not going to follow the jogger as she runs. That's a separate tracking step. But, we have limited this effect to the correct location for the first frame.
VFX expert Lee Lanier begins by exploring shared Boris Continuum controls, and then shows how to apply stylistic effects. He explains how to work with the PixelChooser and Boris Lights, and discusses how to color grade and warp footage. He also takes you through using the Boris Chroma Key Studio and working with Mocha Pro for motion tracking, as well as how to add particles and work with 3D text.
- Overview of Boris Continuum
- After Effects preferences
- Applying stylistic effects
- Relighting with Boris Lights
- Adjusting colors
- Changing the time of day
- Warping footage
- Keying green screen
- Motion tracking
- Adding particles
- Working with 3D text