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Using sequence layers with objects

From: After Effects Apprentice 04: Layer Control

Video: Using sequence layers with objects

There are times where that Cross Dissolve option comes in really handy, mainly if your sources do not have the same size or shape or otherwise have partial transparency or complex alpha channels. I'll open up this next comp, 03b- Sequence - Alpha, and look at these sources. I'll solo one at a time. I've got an old-fashioned cell phone, a microscope, an old-fashioned computer monitor. You can tell these are old models, huh? How quickly technology changes! And a wireframe wheel.

Using sequence layers with objects

There are times where that Cross Dissolve option comes in really handy, mainly if your sources do not have the same size or shape or otherwise have partial transparency or complex alpha channels. I'll open up this next comp, 03b- Sequence - Alpha, and look at these sources. I'll solo one at a time. I've got an old-fashioned cell phone, a microscope, an old-fashioned computer monitor. You can tell these are old models, huh? How quickly technology changes! And a wireframe wheel.

They each have complex alphas so they don't completely obscure one another when they are all turned on top of each other. If I were to select all of them, right-click, go to Keyframe Assistant > Sequence Layers, Overlap 1 second and say Dissolve Front Layer, the same thing I did for the Full Frame videos, you will see my problem. I'll type U to see my keyframes. As the phone starts to fade out, the layer underneath the microscope immediately pops on at full opacity, which is very distracting, and as this starts to fade out, the other layer pops on at full opacity underneath.

There are occasions where you might want sudden pops in your animation like that, but if you're trying to get a nice gentle cross-fade this is not at all what you want. So I am going to undo. They are all still selected. Right click, Keyframe > Sequence. For things that do not completely obscure each other, definitely use Cross Dissolve Front and Back Layers. Click OK. Now see, I have Opacity keyframes for one that fades up while the other is fading down, and now you'll see I have a much gentler transition between these layers with complex or mismatched alpha channels.

By the way, again, underneath, it has Opacity keyframes as well. I'll close this up a little bit so you can see. There we go. So that's where the other option comes in handy.

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Image for After Effects Apprentice 04: Layer Control
After Effects Apprentice 04: Layer Control

38 video lessons · 11887 viewers

Chris Meyer and Trish Meyer
Author

 
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  1. 3m 20s
    1. Overview
      1m 20s
    2. Using the exercise files
      2m 0s
  2. 23m 19s
    1. Stacking and sliding layers
      5m 23s
    2. Trimming layers in the Timeline panel
      5m 45s
    3. Trimming in the Layer panel
      3m 31s
    4. Pre-trimming and inserting layers from the Footage panel
      3m 20s
    5. Slip editing
      5m 20s
  3. 12m 13s
    1. Applying sequence layers to footage
      4m 45s
    2. Using sequence layers with objects
      2m 14s
    3. Example: Sequence layers and photographs
      2m 20s
    4. Creating a new composition using sequence layers
      1m 35s
    5. Understanding the importance of layer order
      1m 19s
  4. 17m 20s
    1. Looping footage
      3m 15s
    2. Importing a sequence of still images
      4m 30s
    3. Using Time Stretch vs. altering frame rates
      3m 23s
    4. Frame blending
      6m 12s
  5. 19m 1s
    1. Overview of blending modes
      7m 5s
    2. Combining modes and effects
      4m 45s
    3. Why apply effects to solids?
      7m 11s
  6. 22m 2s
    1. Using the Effects & Presets panel
      5m 3s
    2. Applying presets
      5m 34s
    3. Working with behaviors
      3m 2s
    4. Creating and saving presets
      8m 23s
  7. 7m 55s
    1. Importing Photoshop files with layer styles
      4m 7s
    2. Applying layer styles inside After Effects
      3m 48s
  8. 9m 27s
    1. Using adjustment layers
      3m 17s
    2. Working with adjustment layers and alpha channels
      3m 14s
    3. Applying a filmic glow treatment
      2m 56s
  9. 6m 50s
    1. Quizzler challenges
      1m 16s
    2. Quizzler solution one: Pyrotechnic composite
      3m 7s
    3. Quizzler solution two: Sequenced fades
      2m 27s
  10. 11m 51s
    1. Idea corner one: Adjustment layer shapes
      1m 55s
    2. Idea corner two: Creating a traveling glass bar
      4m 12s
    3. Idea corner three: Creating sequences from filmstrips
      5m 44s
  11. 27m 23s
    1. Looping footage by crossfading
      5m 20s
    2. Working with effect point paths
      5m 12s
    3. Brainstorming
      7m 19s
    4. Working with pixel aspect ratios
      9m 32s

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