Spheres

Creeated using Ultra Fractal.
Just playing with modifying the mmf4.ufm:3D IFS formula so that it can render transformed primitives as well as doing "plain" RIFS.
Time just over 20 mins at 2880*3840 on a 3GHz P4HT running at around 2GHz (because my CPU gets too hot) in single-threaded mode (because I forgot to change min threads to 2).

Edit: I applied a better method of getting the normals when using primitives and the render time under exactly the same conditions is down to 9 mins 5 secs