Are there any simple programs for 3D fractal visualization?

Prefer开发者_开发百科ably with a source code, but algorithm description would be enough.

POV-Ray can render three-dimensional cross-sections of four-dimensional Julia sets.

Try Quat - A 3D-Fractal-Generator

Not an expert, but this seems to be a pretty decent software regarding real 3d fractals: http://www.incendia.net/

Mainly, your question depends on what type you are interested in: Is it julia sets/mandelbrot sets, and their higher-dimensional relatives, OR is it IFS (such as Flame fractals) in 3 dimensions?

The algorithms are very different, and yields very different results.