[Tyhm]

Yeah, I get it, but then what happens if you want to have two images orbiting each other over a third background-image?

Say, we have a space image in the background, an earth image in the middle, and a moon image going around it. We need the moon to go around the earth, but never behind the space, and never high enough that it'd go over the player. If we have floating point layers, we can do it with earth=0.2, space=0,moon=0.1 to 0.3. If we have index layering, for one Stefan has to redo practically everything he made that depends on the Y thing, for two we have to hide the over-earth moon image, show the under-earth moon image...

I like my way better.