As a computational tour-de-force, I decided to draw a large image of the Mandelbrot set and save it as a macrocell file. The iteration limit was 1000 iterations per pixel, and the bounding box is 258687 by 221688. https://docs.google.com/open?id=0B7zc3Wqisi4jenRfQmlmQTJ4LXM There's some slight mutilation, unfortunately, due to the lazy recursive sampling method I used. I think the worst (only?) case of this is the southernmost minuscule 'copy' of the Mandelbrot set, which does not appear reflected in the real axis. I've used machine-precision complex numbers to accelerate the process; hence, there is some very minute asymmetry. Oh well. The computation took 20427 seconds on my old 1.3 GHz single-core machine from 2001. Individual 32 by 32 squares are computed in efficient C code and assembled by Mathematica 8. I then optimised the quadtree (resulting in a reduction in file size by almost an order of magnitude from 722MB to 85MB) using a C++ program. The GZipped version (25MB) is available for download from the above link. Sincerely, Adam P. Goucher