(...) Doing some Googling myself revealed a whole plethora of HDR programs: (URL) what I got out of the page I read, Luminance is the originator of the format. -Orion (21 years ago, 22-Mar-04, to lugnet.cad.ray)
(...) Pardon my ignorance but what's an hdr file? I couldn't find any mention of hdr in the POV-Ray documentation (21 years ago, 22-Mar-04, to lugnet.cad.ray)