Join Chris Meyer for an in-depth discussion in this video Using alpha mattes, part of After Effects Apprentice 05: Creating Transparency.
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In this chapter we're going to play around with an alternate way of…creating transparency, track mattes.…I've gone head and closed all of my previous comps.…I am going to open up a blank comp, 08a-Alpha Matte*starter.…If you don't have the exercise files, just create a blank comp of your own, find…a piece of footage, and find something with new interesting alpha like a piece of text.…I am going to go down to my Sources folder.…I want to pick a background layer such as this VirtualInsanity.…I can drag it to my comp or I can use the shortcut, which is holding Command on…Mac, Ctrl on Windows and typing forward slash.…
Then I am going to select a layer with an interesting alpha such as this piece…of text Night Vision.…Again Command or Ctrl+/ and there it is.…A very common use of track mattes is to use one layer to fill the alpha of another layer.…For that to happen the layer with the interesting alpha channel must be on top…of the fill layer and you must have the Modes panel open.…If you can't see the Modes panel, right- click on any header and select Column > Modes.…
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®.
- Creating masks using parametric shapes or freeform with the Pen tool
- Editing and animating masks
- Combining multiple masks
- Using one layer to define the transparency of others
- Explaining the interaction between effects, masks, and mattes
- Mastering mask animation