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Radial Wipe
This effect reveals an underlying layer using a wipe that circles around a specified point. At
Best quality, the edges of the wipe are anti-aliased.
The Start Angle option specifies the position or angle at which the transition starts. With a
start angle of 0 degrees, the transition starts at the top of the layer. Wipe specifies whether
the transition moves clockwise, counterclockwise, or alternates between the two.
Venetian Blinds
This effect reveals an underlying layer using strips of specified direction and width. At
Draft quality, the strips are animated with pixel accuracy; at Best quality the strips are
animated with subpixel accuracy.
Venetian Blinds creates a striped transition from one layer to another.
Video effects
Use these effects to prepare your movie for video.
Broadcast Colors
This effect alters pixel color values so that the layer can be accurately represented in a
television broadcast. Computers represent colors as combinations of red, green, and blue.
Consumer video equipment represents colors using different composite signals. Home
video equipment cannot reproduce signals above a certain amplitude, and computer-
generated colors can easily exceed this limit. (Signal amplitude is measured in IRE units;
120 IRE units is the maximum possible transmission amplitude.) This effect reduces
luminance or saturation to a safe level. The layer's quality setting does not affect the
Broadcast Colors effect.
Reducing saturation requires greater amplitude modification than reducing luminance to
achieve the same IRE unit level, which alters the appearance of your image more. Key Out
Unsafe and Key Out Safe make it easy for you to determine which portions of the layer will
be affected by the Broadcast Colors effect at the current settings. If you make your
background a contrasting color and temporarily select Key Out Unsafe or Key Out Safe, the
background will be visible through affected or unaffected areas of the layer, respectively.
For more information, see the After Effects product section on Adobe's Web site.
Reduce Interlace Flicker
This effect reduces high vertical frequencies to make images more suitable for use in an
interlaced medium (such as NTSC video). For example, images with very thin horizontal
lines can flicker annoyingly when broadcast. Reduce Interlace Flicker softens horizontal
edges to reduce the flickering.
Note: Flicker may result from fields that have not been separated. For information on
separating fields, see "Using interlaced video in After Effects" on page 43.
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Applying Effects
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