Here is a bloom effect that uses a canvas object... Lots of fun...Go ahead and check it out.
ATTENTION!!! This needs my "Contrast Plus" Effect. You can download it here:
Download Effect
<img src="http://i36.tinypic.com/1izz81.jpg">
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Note: If you do this, make sure you set the Canvas object to grab the layout BEFORE. After will produce the "Hall of Mirrors" and the full screen will "bloom"