Gradient Wipe Effect; Iris Wipe Effect - Adobe AFTER EFFECTS 7.0 Manual

ADOBE AFTER EFFECTS 7.0
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User Guide
Specifies the amount and speed of rotation jitter at the x, y, and z axis. X, Y, Z Rotation Jitter Amount
Rotation Jitter
specifies the amount of rotational jitter along an axis. A value of 90˚ makes it possible for a card to rotate up to 90˚
in either direction. X, Y, Z Rot Jitter Speed controls the speed of rotational jitter.

Gradient Wipe effect

The Gradient Wipe effect creates transitions based on the luminance values of a second layer, called the gradient
layer. The luminance of a pixel in the gradient determines the time at which the corresponding pixel in the first layer
becomes transparent. Dark areas of the gradient layer represent those areas which become transparent first, followed
by lighter areas.
This effect works with 8-bpc and 16-bpc color.
Original (left) and after applying the Gradient Wipe effect (center and right)
For example, a simple grayscale gradient from left to right produces a left-to-right wipe. The gradient layer need not
be a still image; you can use any layer in After Effects as a gradient for unusual wipe effects. You can create more
interesting wipes in a variety of ways. The Ramp effect is a good starting point because it can generate a variety of
grayscale gradients. To make completely custom gradients, paint them in a program such as Adobe Photoshop, or
draw them in a program such as Adobe Illustrator.
Adjust the following controls for the Gradient Wipe effect:
Specifies the percentage of the transition applied to the layer.
Transition Completion
Specifies the amount of softness applied to the transition's edge.
Transition Softness
Specifies the layer used as the gradient. The gradient layer must be in the same composition as the
Gradient Layer
layer to which you apply Gradient Wipe.
Specifies how the gradient is positioned and sized in the layer. Tile Gradient creates multiple
Gradient Placement
tiled copies of the gradient. Center Gradient places a single gradient in the center of the layer. Stretch Gradient to Fit
resizes the gradient layer horizontally and vertically to fit the entire area of the layer.
Inverts the position of the gradient layer and the layer affected by the gradient transition.
Invert Gradient

Iris Wipe effect

The Iris Wipe effect creates a radial transition that reveals an underlying layer. Specify the number of points used to
create the iris using a range of 6 to 32 points, and specify whether an inner radius is used. When Use Inner Radius
is selected, you can specify values for both Inner Radius and Outer Radius; the iris is not visible when Outer Radius,
Inner Radius, or both are set to 0. The iris is roundest when both Outer Radius and Inner Radius are set to the same
value.
This effect works with 8-bpc and 16-bpc color.