New Layout
Finally, I retouched the layout. After so much time with the minimal style, I felt for a graphical intensive display once again. The blue color map was just too relaxing, I spent the night zooming in and I ended up with a few nice spots. The effect is known as "pure CSS compositing", you can learn more about it on CSS/edge. Basically you need two images, a vivid one for the body background and a washed out one for the text background. You need huge images but the washed out one will compress nicely. Tip: for the Mandelbrot Set we typically have one color per iteration. The point get it's color from the number of iterations it takes for it to escape. For 255 or less iterations, you can use color index images without any loss of quality.
Making the washed out image out of the vivid one is pretty straight forward, you just paste a white layer and set opacity to ~80%. A script to update the background would be a few lines, provided that you have enough nice spots and bandwidth. At the moment the zooming is a bit broken in Frat, I can't just pick the URL from good spots and make bigger renders, I need to play with the zoom. Once this is fixed, we'll see how far I'm willing to take it.