Join Chris Meyer for an in-depth discussion in this video Working with adjustment layers and alpha channels, part of After Effects Apprentice 04: Layer Control.
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Now remember in the previous movie I said that After Effects makes the copy of…all the layers underneath the adjustment layer and then copies that composite…into the adjustment layer.…You still have all those layers underneath.…The adjustment layer is just a copy of them.…That means that anything that affects the Opacity or Alpha Channel adjustment…layer will have an affect on the final results.…For example, if I do something simple like just press T for Opacity, as I…fade the adjustment layer out, you'll see I'll get back to the original composite underneath.…So this gives you sort of blend with original for your effects applied to…the adjustment layer, and by the way you can apply more than one effect to…that layer, so the Opacity becomes a blend with original for the entire effects of the stack.…
Now I'm going to type Shift+S to reveal Scale and scale down adjustment layer.…As I do so, only a portion of my frame is going to get the effects applied to…this adjustment layer.…So I'm only blurring the area underneath this adjustment layer.…
The After Effects Apprentice videos on lynda.com were created by Trish and Chris Meyer and are designed to be used on their own and as a companion to their book After Effects Apprentice. We are honored to host these tutorials in the lynda.com Online Training Library®.
- Sliding and trimming
- Slip-editing and insert-editing layers
- Employing blending modes to enhance layers and composites
- Applying, modifying, and saving animation presets and layer styles
- Using adjustment layers to affect multiple layers
- Experimenting with effects using Brainstorm
- Understanding pixel aspect ratios