HDR stands for High Dynamic Range and its being touted as the next big thing in visual realism for gaming.
http://www.shacknews.com/onearticle.x/37418
I find this cool to imagine in games, these are HL2 characters put in real photos using HDR:
[img]http://members.iinet.net.au/~kris.mar/Previs%201.jpg[/img]
[img]http://members.iinet.net.au/~kris.mar/Comptest7.jpg[/img]
[img]http://members.iinet.net.au/~kris.mar/Comptest16.jpg[/img]
Loads to be found here:
http://forums.facepunchstudios.com/show ... ge=1&pp=20
yum