The image was created with fractint and used as height field as well as for coloring of the image. The right image shows the first digits of the number pi. The table was created by a modified checker pattern. First, I wanted to show you a nice tiling of the poincare disc. When I've finished this code I will put it on my web page.
All textures are part of the povray distribution.
The illumination was done with four spotlights and two point light sources. But feel free to email me for asking about details of my scene.