I have this problem that has been makin me crazy. I want to make an erasor for the drawing api basically. Since I wasn’t able to accomplish it, i looked everywhere!!! no luck 
So far I have been able to “erase” with shapes. For instance, I can drag a circle out and see the masked item underneath. The very next shape I drag out cancels the mask from the previous shape as if you can only have 1 mask per maskee. Also, I cant get a line drawing to become a mask.
//creating the shape
_level3.drawingPlane.createEmptyMovieClip(“layer”+level3.layer+""+i, _level3.layer);
// dynamically setting the mask _level3.water.setMask(_level3.drawingplane[“layer”+level3.layer+""+i]);
If anyone out there needs any more code, an example, etc, let me know!
thankyouthankyouthankyou
