Well I am facing 2 issues which are similar I guess.
1. I have a candy which when the user presses the eat button, I want 10% of the top image to be cropped each time.
2. I have a candy on which where ever the user clicks, I want to remove some portion of the candy. The portion should have rough edges and and should be the area where the user clicks.
I think it has something to do with ClippingNode but I would appreciate if someone could give me an example.