Quote - uncheck "smooth polygons", "remove backfaces" and "displacement maps" if possible.
if stuck with FFRender, reduce all textures to minimum size, delete all unused morphs,
do whatever the others said, but skip the part about virtual memory, as apple has
thoughtfully taken away control of that from typical users.

According to the Poser 7 manual, "Enabling [the remove backfacing polys] option can greatly speed up render times but can affect realism, especially when using ray tracing." So shouldn't I turn it on to speed up rendering?

As for texture size, I can't find the option in Poser 7 anymore. Someone in another thread said that textures are handled differently now, so there's no need to lower max texture size...unless there's another place besides the render options that you can do it?

And out of curiosity, how does deleting unused morphs help? Does it load all the morphs in a model, even if they're not being used?