Quote - The various memory management improvements that were added to P7 - the program bits that help reduce memory consumption on the fly - are not implented in the external Firefly renderer that gets invoked when you "render in a separate process

That's not really correct, as what you mean (the adaptive bucket size) was implemented in Poser 6 and didn't help that one to render large scenes as the real improvement of Poser 7's firefly is that it doesn't need to load all textures in memory first. When you have the right bucket size for your image (bucket size isn't measured in MB by the way) then the external renderer can of course render heavier scenes as it doesn't need to squeeze Poser's program data into the same memory as the textures, geometry, bucket, etc.