I have only a rudimentary understanding of HDRI lighting so maybe this question will sound off base but... If you just convert a spherical camera rendering to *.hdr file don't you end up with a "LDRI"? Low dynamic range image? Wouldn't this only approximate true HDRI lighting when used in C3? Would it be possible to "expand the range" of the C3 "LDRI" with different "exposures" in C3.? I think I've seen this talked about somewhere. Sorry for all the quotes! Ed