The creator of the cover image for the book "The Science of Fractal Images," Hartmut Jürgens, is apparently a Macintosh user, and has started using my application, FractalWorks. He tells me he found my app when searching the internet for images related to the book "The Beauty of Fractals."
We've been corrisponding, and he challenged me to try to duplicate the cover image from "The Science of Fractal Images." I took a stab at it, and think I got reasonably close. Here is my image:
And here is a link to an image of the cover of the book:
That image is quite small. The one on the cover of the book is much clearer.
I suspect I'm using a different algorithm to calculate my height values (I'm using distance estimates, and I think Herr Jürgens is using continuous potential values) so the landscape has a somewhat different topology, but this seems fairly close.
What does everybody think?