A Mandelbulb fractal
The function I implemented is a bit wrong but the output was OK, running on about 30 FPS in 800×600 🙂

Only diffuse and specular light is used when rendering.

Rendered using DirectX, Shader Model 4.0.

Programming: digitalerr0r of Dark Codex (me )
Music: sabotender of Dark Codex

Two great sources on the Mandelbulb:
http://www.skytopia.com/project/fractal/mandelbulb.html
http://en.wikipedia.org/wiki/Mandelbulb