Thank you - yes, it is completely done in UF. But there are loads of other people doing stuff with UF I'd really LOVE to do and haven't a clue how they do it, but then I don't spend a huge amount of my time just working on fractal art.
WOW! I don't know how to treat UF, I'm a Mandelbulbarian. But I do spend too much time with fractals, espiacally animations last time. It's not so easy to find the right way.