Please feel free to write this plugin.
--
Robert Krawitz [EMAIL PROTECTED] http://www.tiac.net/users/rlk/
Tall Clubs International -- http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom -- mail [EMAIL PROTECTED]
Project lead for The Gimp Print --
Take a look at the existing fractal explorer in Filters-Render-Pattern.
I think this basically does what you want. It doesn't support arbitrary
functions (I bet you could code in your own if you really wanted to), but
has quite a few options, and I imagine it could produce (with help from
the