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Masking in the Layer panel

From: After Effects Apprentice 05: Creating Transparency

Video: Masking in the Layer panel

Let's say that I want to have two windows on this footage instead of just one. If I want to draw a second mask, I can reselect my mask shape tool and start dragging, but I'm rather blind as to what I'm dragging here. I can go ahead and hold the Spacebar to reposition a mask, but you know there is a better way, and that better way is to edit my mask shapes in the Layer panel. So I'm going to undo to get rid of my second shape, and double-click my layer to open it up in its dedicated Layer panel. That way I get to see just as footage with no distractions of external layers, any effects, any scaling.

Masking in the Layer panel

Let's say that I want to have two windows on this footage instead of just one. If I want to draw a second mask, I can reselect my mask shape tool and start dragging, but I'm rather blind as to what I'm dragging here. I can go ahead and hold the Spacebar to reposition a mask, but you know there is a better way, and that better way is to edit my mask shapes in the Layer panel. So I'm going to undo to get rid of my second shape, and double-click my layer to open it up in its dedicated Layer panel. That way I get to see just as footage with no distractions of external layers, any effects, any scaling.

I can focus just what I'm working on. The View popup defaults to looking at masks, which is what I want. Also, the Render option defaults to on. This means that it actually going to cut out my footage. However, if I want to see the entire clip and just the mask outline, I'll turn off Render and now I get to see the whole clip and now it's much easier to go ahead and select around an additional object I might want to mask out. There I've used the rounded rectangle, which was previously selected. I can undo and change my tool to something like the Ellipse tool and drag that out.

Draw my layer, hold the Spacebar to reposition a mask, release, and there is my second shape. Click Render, turn Render off, there is my whole footage. I go back to my Comp panel. I will now see this footage in context with my cutout layer revealing portions on my background layer behind it. Turn off my mask outline and now I get to see the footage with a nice clean mask edge.

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This video is part of

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After Effects Apprentice 05: Creating Transparency

38 video lessons · 12631 viewers

Chris Meyer and Trish Meyer
Author

 
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  1. 3m 17s
    1. Overview
      1m 17s
    2. Using the exercise files
      2m 0s
  2. 28m 53s
    1. Creating basic mask shapes
      5m 7s
    2. Using advanced parametric shapes
      3m 35s
    3. Basic mask shape editing
      4m 35s
    4. Masking in the Layer panel
      1m 55s
    5. Working with mask parameters
      4m 0s
    6. Animating masks
      5m 52s
    7. Creating vignettes
      3m 49s
  3. 25m 56s
    1. Masking with the Pen tool
      6m 44s
    2. Editing a mask path
      6m 19s
    3. Using RotoBezier masks
      4m 32s
    4. Targeting masks for animation
      3m 13s
    5. Setting the first vertex point
      5m 8s
  4. 19m 7s
    1. The basics of variable-mask feathering
      7m 33s
    2. Exploring variable-mask feathering options
      5m 56s
    3. Exploring visual effects applications
      5m 38s
  5. 7m 55s
    1. Exploring mask modes
      3m 58s
    2. Fading mask opacity
      3m 57s
  6. 11m 48s
    1. Using targeted treatments
      2m 35s
    2. Filling mask shapes
      3m 8s
    3. Following mask paths
      6m 5s
  7. 13m 31s
    1. Using alpha mattes
      3m 48s
    2. Grouping track matte pairs
      3m 40s
    3. Working with luma mattes
      3m 52s
    4. Animating mattes
      2m 11s
  8. 10m 0s
    1. Using Stencil Luma
      3m 5s
    2. Using Stencil Alpha
      2m 5s
    3. Using effects with stencils
      2m 20s
    4. Stacking stencils
      2m 30s
  9. 8m 23s
    1. Quizzler challenges
      1m 18s
    2. Quizzler solution one: One word at a time
      3m 53s
    3. Quizzler solution two: Stroke drawing direction
      3m 12s
  10. 11m 18s
    1. Idea corner one: More masks and effects
      2m 50s
    2. Idea corner two: Transition effects
      3m 44s
    3. Idea corner three: Sequenced layers as mattes
      4m 44s
  11. 16m 29s
    1. Understanding track matte rendering order
      5m 48s
    2. Exploring mask interpolation
      10m 41s

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