Mirror Effect; Offset Effect - Adobe AFTER EFFECTS 7.0 Manual

ADOBE AFTER EFFECTS 7.0
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User Guide
To select multiple vertices, Shift-click the vertices.
Adjust the following controls for the Mesh Warp effect:
Specify up to 31 patches vertically (Rows) or horizontally (Columns). For broader distortion, use
Rows, Columns
fewer patches. For finer control, use more. Drag the vertices and tangents to change the grid shape. The image follows
the grid shape according to the elasticity setting and the boundary created by the adjacent patch.
Specifies how closely the image follows the shape defined by the curve. The higher the quality value, the
Quality
more closely the image follows the shape. Higher quality settings require more rendering time.
Click the stopwatch to animate the distortion over time.
Distortion Mesh
Note: Each patch becomes a boundary for the distortion. For example, when you stretch a patch, the area of the image
in the patch stretches, squishing the area of the image in the adjacent patch. The boundary of the adjacent patch protects
the image inside it from being squished to zero. In other words, you can't push an image out of its patch.

Mirror effect

The Mirror effect splits the image along a line and reflects one side onto the other. Reflection Center specifies the
position of the line. Reflection Angle determines which side is reflected and where the reflection appears. An angle
of 0 degrees reflects the left side onto the right. An angle of 180 degrees reflects the right side onto the left. An angle
of 90 degrees reflects the top onto the bottom. An angle of 270 degrees reflects the bottom onto the top. The layer's
quality setting influences the Mirror effect. At Best quality, the reflected image is smoother and more accurate.
This effect works with 8-bpc and 16-bpc color.
Original (left) and with variations of Mirror applied (center and right)

Offset effect

The Offset effect pans the image within a layer. Visual information pushed off one side of the image appears on the
opposite side. At Best quality, the offset is performed with subpixel precision.
Shift Center To specifies the new position of the original image's center point. Blend With Original specifies the
amount by which the offset image is blended with the original image.
This effect works with 8-bpc and 16-bpc color.
Original (left) and with variations of Offset applied (center and right)