It's worth mentioning that Structure is known as JLK over at Sharecg.

Also bear in mind that Structure (going by his forum posts in the past) has been unhappy with Renderosity for some time (IIRC at least a full year), and has thought about leaving for almost as long. His problems, as I recall, were the trolls in the Poser forum as well as the horrendously executed yearly site redesigns, particularly the most recent one.