Field of Depth

I was going to hold these until the release of the 3D Apophysis hack, but I am starting to do stupid things already, like doing some really small adjustments and re-rendering it again, and then thinking like "oh, this one isn't so good, I shouldn't submit it at all..." Well, I'd better let it out then...

This one started as a test-render for the "depth of field" effect. I'm still not sure that my DOF is implemented correctly though...