I started a second render this morning with some massive skyscraper like objects as a population.
hopefully it should be done by the time I get home.
I'll add more changes after that....
I'm not clear on how to get better rotation variations on the populations.
yesterday I made a second fractal design in GIMP to be used as a color map/texture, much like the luminosity mask in the piece, but it did'nt work, the luminosity/light from the mask just covered up the color and it was'nt noticeable.