Just to add---- "Food for the minds Eye!".

Can not "dark" images still have a vibrancy that, perhaps, are more visually stimulating?
Just a couple of quickly found examples , if of value---

http://forums.cgsociety.org/showthread.php?f=137&t=669620

http://forums.cgsociety.org/showthread.php?f=137&t=586825

http://forums.cgsociety.org/showthread.php?f=137&t=524391

http://forums.cgsociety.org/showthread.php?f=137&t=498738

Brian

bwtr