I searched this forum on how to do this in P6, but most of the results went to messages with dead links. but you see yer problem. the light source is not the skydome, it's not IBL nor HDRI. trying to do this in poser is extremely slow and difficult compared to more modern renderers. in carrara, one can just click a coupla buttons and it's done, but in poser I can't even find an useful thread here that explains it in terms that don't involve various fake tricks. they always seem to degenerate into a scene that uses infinite or spotlites. unfortunately, I wasn't able to find any threads on how to do it in P7 either. they appear to refer to something else, and often contain erroneous info.