"I would suggest you ammend the rules to include the ability to post WIPs in your own galleries then (eliminating anonymity completely) or the ability to take existing renders, change something-anything-and  rerender it as new to be able to submit it."

Sure, that would be be fine. Personally, I do not care who wins or who posts what where. I like the idea of the challenge as a way to get inspired and to see what others come up with. The entries were all great takes on the theme. As far as I am concerned, there is no need for any voting/placements. Just have a Challenge gallery to show the many different approaches to convey the same idea.

Ciao
TD