Masking Exersise pt2

Second part to masking exercises. Not in any way related to the last one. Just messing with masking and effects.

To do this wall shatter effect you need 3 copies of the layer you want to shatter. First make the mask on the original layer. Copy it for 2 more copies. Change the masking options for one of the to be "subtractive" as apposed to "add". This layer will serve as the layer with the hole in it. The "add" layer will be the layer you add the effect to. And the 3rd layer which will also be an "add" layer is there to fill the hole till you want it to shatter.