Adobe After Effects - Manual (Page 537)

Radius
Center Of Ripple
Type Of Conversion
Wave Speed
Wave Width
Wave Height
Ripple Phase
To the top
Source Mask
Note:
Boundary Mask
Mask Offset
This effect works with 8-bpc and 16-bpc color.
Controls the distance the ripples travel from the center point. The Radius value is a percentage of the image size. If the center of the
ripple is the center of the layer and the radius is set to 100, the ripples travel to the edge of the image. A value of 0 produces no ripples. Like
ripples in water, ripples in the layer become smaller as they travel farther from the center.
To create a single-wave ripple, set Radius to 100, Wave Width to a value in the range from 90 to 100, and Wave Height as desired.
Specifies the center of the effect.
Specifies how the ripples are created. Asymmetric produces more realistic-looking ripples; asymmetric ripples include lateral
motion and produce more distortion. Symmetric produces motion that travels only outward from the center point; symmetric ripples produce less
distortion.
Sets the speed at which the ripples travel outward from the center point. When you specify a wave speed, the ripples are
automatically animated at a constant speed (without keyframes) across the time range. A negative value makes the ripples move toward the
center, and a value of 0 produces no movement. To vary wave speed over time, set this control to 0, and then create a keyframe for the Ripple
Phase property of the layer.
Specifies the distance, in pixels, between wave peaks. Higher values produce long, undulating ripples, and low values produce many
small ripples.
Specifies the height of the ripple wave. Taller waves produce greater distortion.
Specifies the point along the waveform at which a wave cycle begins. The default value of 0° starts the wave at the midpoint of its
downward slope; 90° starts it at the lowest point in the trough; 180° starts it at the midpoint of the upward slope, and so on.
Smear effect
Using the Smear effect, you define an area within an image and then move that area to a new location, stretching, or smearing, the surrounding
part of the image with it. Use masks to define the area you want to distort.
This effect works with 8-bpc and 16-bpc color.
To use Smear, first create or import two masks: the source mask and the boundary mask. You can create masks on the layer in After Effects or
use masks created in Adobe Illustrator. To use a mask created in Illustrator, copy the mask and paste it into a layer in After Effects. Masks must
be closed to work with Smear; if a mask is an open trace, After Effects closes it when you select it. Both masks must be on the same layer as the
footage to which you apply the Smear effect, although you can copy masks from another layer.
When you move the source mask within the image, Smear stretches the portion of the image inside the boundary mask to follow the edges of the
source mask. The boundary mask tries to protect the image outside it from being stretched. Both the original position of the source mask (set in
the Layer panel) and the offset position of the source mask are displayed in the Composition panel. A light red outline indicates the first position of
the source mask; a dark outline indicates the new position.
You can animate the position, size, and rotation of the source mask as it moves to its offset position. You can also animate the original position of
the source mask in the Layer panel.
Processing can take up to several minutes with certain settings. Computation time increases as the source mask gets closer to the boundary
mask. Processing is interrupted when you click a control.
Specifies a mask as the source mask. By default, After Effects selects the second mask you create or import for the layer as the
source mask.
You must specify both a boundary mask and a source mask to create a distortion.
Specifies a mask as the boundary mask. By default, After Effects selects the first mask you create or import as the boundary
mask.
Specifies a destination position for the source mask. The offset is a position specified by x and y coordinates, which appear to the
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