i want to make a blur filter (or something like that) but only in an area and the blur should only work on what is in the back of this area (the area should be an square, ellipse or fxg). I have found an example that shows at 0:36 on the right side of the screen something like i want to build. http://vimeo.com/10723525
ps. sry my english is not the best.
No one have an idea ? I just hoped somebody would know how i can do that.