Apple Motion 2 Getting Started - Manual (Page 162)

162 Chapter 5 Extra Credit
Since the default Mask Blend Mode is set to Add, the shape masks the stingray image
and reveals the image below the stingray (the dolphin image). Once an object has
been applied as an image mask, the original object is disabled in the Layers tab.
4 To reveal the dolphin image using the animated mask, you can do one of two things:
• Change the Mask’s Blend Mode to Subtract.
• Invert the mask.
Stencil is turned on by default. When using an animated shape, text object, or image as
a mask source, Stencil allows the mask to respect the changes in the image mask
source object. In this example, the shape that is used as the mask source is transformed
by the Grow/Shrink filter. Stencil must also be turned on for mask source objects that
are animated using keyframes. If Stencil is not turned on, the original size and position
of the source mask are used (no animation is present in the mask).
Note: The method for using an image or text object as a mask is the same as using a
shape as a mask. Also, you can apply multiple image masks to the same object.
For more information, see Chapter 11, “Using Shapes and Masks,” in Motion Help.
Audio
Music can give life to your motion graphics project—sometimes it is a requirement,
other times it just gives you a bit of inspiration. In Motion, you can import audio, slip
tracks to sync audio to your project, and mix audio levels.
The supported audio file formats include AIFF, WAV, MP3, VBR (Variable Bit Rate) MP3,
and AAC (M4A).
Note: AAC files purchased from the iTunes Music Store are not supported.
Disabled mask
source object
2505.book Page 162 Wednesday, June 30, 2004 5:58 PM