Adobe After Effects CS3 - Manual (Page 546)

AFTER EFFECTS CS3
User Guide
541
Original (top left), and with effect applied (bottom left and right)
Linear Wipe effect
The Linear Wipe effect performs a simple linear wipe of a layer in a specified direction. At Draft quality, the edge of
the wipe isn’t anti-aliased; at Best quality, the edge of the wipe is anti-aliased and the feather is smooth.
Wipe Angle The direction that the wipe travels. For example, at 90˚ the wipe travels from left to right.
This effect works with 8-bpc and 16-bpc color.
Original (top left), and with effect applied (bottom left and right)
Radial Wipe effect
The Radial Wipe 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.
Start Angle The angle at which the transition starts. With a start angle of 0˚, the transition starts at the top.
Wipe Specifies whether the transition moves clockwise or counterclockwise, or alternates between the two.
This effect works with 8-bpc and 16-bpc color.