The first "no lights" thread and render I ever did was December 2006 and it was with the Ennis HDR. Technically it had a light - an IBL. But back then, using dozens of spot lights was the usual technique. Also, Poser couldn't deal with HDR images then, so it's a little flat, even though I made an attempt to boost the dynamic range.

http://forum.runtimedna.com/showthread.php?25435-Not-your-average-IBL-image

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)