Adobe After Effects - Manual (Page 549)

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Transition Width
Back Layer
Block Dissolve effect
The Block Dissolve effect makes a layer disappear in random blocks. The width and height of the blocks, in pixels, can be set independently. At
Draft quality, the blocks are placed with pixel precision and have sharply defined edges; at Best quality, the blocks can be positioned with subpixel
precision and have soft edges.
This effect works with 8-bpc and 16-bpc color.
Original (upper-left), and with effect applied (lower-left and right)
Card Wipe effect
For information on properties shared by the Card Wipe and Card Dance effects, see Common Lighting controls and Material controls.
This effect simulates a group of cards displaying a picture and then flipping to display another picture. Card Wipe provides control over the number
of rows and columns of cards, the flip direction, and the transition direction (including the ability to use a gradient to determine flip order). You can
also control randomness and jitter to make the effect appear more realistic. By varying the rows and columns, you can also create venetian blind
and Chinese lantern effects.
The Card Wipe effect shares many controls with the Card Dance effect.
This effect works with 8-bpc color.
Original (upper-left), and with effect applied (lower-left and right)
Basic controls
The width of the area that actively changes from the original to the new image.
The layer that appears in segments on the backs of the cards. You can use any layer in the composition; its Video switch can even
be turned off. If the layer has effects or masks, precompose the layer first.
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