This is a simple AS3 experiment creating a drip splatter effect which reveals text on a page.

The idea here is to have mouse movement which creates drips or paint splatters which then reveals text on the page. The challenge is that if you’re dropping bitmaps onto the stage with each mouse movement, the SWF very quickly becomes overfull of bitmaps and your CPU will slow to a crawl. So I used the Flash bitmapData.draw method to basically take a “snapshot” of the drip layer after 10 bitmaps have been added and then toss the bitmaps after the snapshot has been taken. That way the flash doesn’t have to keep track of a huge number of bitmaps and the SWF takes it very easy on the CPU.

You can download the source files here.