Hiya gang!
I thought i’d pitch in here too since i’m in on the same subject of 3d fractals in ZB2 on a separate thread, so why not cooperate on this and try to get it working 
The use of Quaterion based 3d fractals is ofcourse the most common and probably the simplest use of them if you don’t include fractal landscapes which isn’t really interesting now. But it’s also possible to use common fractals such as Julia and standard Mandelbrot with modifications and then kinda “slice” them up in planes and then you interpolate the data between the points that make up the fractal shape and generate a mesh outta those points. And the higher the density is between the points the more complex your mesh will be. But that could be adjusted with a value.
No need for anything fancy. Simplest thing to start with might be to try to take a number of points if you can generate that within ZB2 and randomly spread those around inside a invisible 3d cube and between those points u calculate the fractal and there by containing the data so a volume and not going wild by allowing it to calculate outside the invisible cube. Now i’m not a programmer at all, i can’t say if this all is possible within ZB2 but i sure hope so.
I’ll be more than happy to provide any type of information, formulas, ideas and tips on what to do and how to do it, then it’s up to you who actually can make scripts and plugins to get your head around this
which would totally rock if you could do it.
/ Max