'Green Chromakey' Script
Chromakeying is a technique for blending two images, in which a color (green in this case) from one image is removed, or made transparent, revealing another image behind it. The process is fully automated and requires no user interaction. As result You get one layer with transparency, which replaced green color. Now you can put any background you would like behind your cut-out object. Just make sure you place the background into a layer behind your current layer.
