A 3D fractal spiral rendered with FractalWorks, a free, high performance fractal renderer for Macintosh computers. You can download fractalworks and try it yourself at the FractalWorks download site.
If you have the current version of FractalWorks, you can recreate this
plot by copying the link below to the clipboard, then selecting
"New Fractal from URL in clipboard" in FractalWorks:
Fractalworks plot Sprial