Same technique as last post, except with vertical and horizontal squiggles composited together.
NOTE: I really want to encourage people to blur their eyes a bit and step back from the monitor to look at this image. Up close, of course, it just looks like a garbled grid. But as you step back, the image in its full fidelity really jumps out. You have to filter out that high frequency energy that prickles your eyeballs when you're up close.