🚀 go-pugleaf

Hi, I was curious about generating fractal images with other iterations
than z = z^2 + c. Once you have the source to a fractal program it's
easy to change the computation inside the inner loop to be whatever
you want. So far I have tried
	
		z = z^3 + c
		z = exp(z)+c

(if you think the usual iteration is slow, wait till you try the
exponential one...)

The first one gives a mandelbrot-like set, while with the second the
only interesting portion seems to be a tendril-like (spiral) structure.

So my questions are: 

a) what other kinds of iterations generate particularly interesting images ?
b) is there some other "interesting" area of the exponential iteration
   other than the tendril ?

I don't have any books on fractals; but I'm maybe our library does. Do
the books discuss other iterations in much detail ?
 
Thanks for any advice/discussion.


					Andrew V. Royappa
					avr@purdue.edu
					{pur-ee,decvax,ucbvax}!purdue!avr

p.s. Incidentally, all this is originated out of sheer (idle) curiosity, not
because of some potentially useful research that I'm doing. Sorry.