+1  A: 

You could use pixel bender to create a custom filter for this, or you could try to use displacements maps. Either method could end up looking pixel-y or distorted and not necessarily what you want. The above example seems like it's being played on a circular game map rather than being a rendering effect.

Iain
At this time i am looking for pixel-y or distorted result. Could you provide an example for displacements maps or custom filter?
zproxy
I found the example:http://www.emanueleferonato.com/2007/12/03/understanding-flash-displacement-map-filter/
zproxy