I feel like I'm missing something really simple, but how do I get the letters to only show when they are overlapping the green? I've checked out the examples, I've searched through the forum, and I just can't figure it out. I feel like I'm taking crazy pills!
Ok, so I figured out that if I put the mask (green sprite) on a layer above and set that layer to blend destination in that works for the letters, but it also crops everything below that layer including background and anything else that happens to be there, which is no good.