what the heck is this ? how cool is the lighting filling ?!?!?
can you explain a little deeper how it is done ?
 

Thanks for the nice comments. I'm having a lot of fun now with UF 5. It gives the opportunity to import an image. Because the program turns an image into a coloralgorithm, you can do a lot fun stuff with it.
For this sculpture I imported an image of a golden ball with lightspots (made in UF too), this image is responsible for the coloring of the sculpture.

That's possible in UF, but I think in this case it's using a colouring formula that maps the image into coordinates derived from an orbit-trap style algorithm. There are many ways of doing that
Another alternative is to map the image to a fractal using field lines as one axis and distance estimator as the other.