TITLE: A new kind of fractal?
QUESTION [51 upvotes]: http://www.gibney.de/does_anybody_know_this_fractal
Is this some known kind of fractal?
Update: This one got a lot of great feedback from around the net. I summarized it in the section labeled "Update 24.10.2012".

REPLY [2 votes]: The intensity as defined is $0$ for almost all values of $z$, so it is unclear how the visualization relates to the definition.  If you post the code that generated the images you will have a better chance of getting a satisfactory answer, and that would also address @doetoe's observation of what are apparently artifacts.