Blow Away
The image is split into tiles that get "blown away" revealing the image beneath.

Effect
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Select "Blow Away"
Direction
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The direction of the effect. It can be "up", "down", "left" or "right".
Columns & Rows
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How to split the image into tiles. The more tiles, the slower it will run.
Max Delay
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How much of the duration is used before all the tiles are are moving