Dude! Your works alone sold a lot of copies of LS. Did a quick search and found:
http://www.jerrypournelle.com/report...d_ems_page.htm
It is just a bit of history but there is mention of the original creator and the company that was Lightscape Technologies, Inc. Some Greenberg Don guy at Cornell...Don Greenberg’s research in the field of radiosity rendering at Cornell
http://accad.osu.edu/~waynec/history/lesson5.html
That should get you started.
Ismael