Hate to say it, but Poser modellers are going to need to reevaluate the way they design stuff, if they intend to keep up with rendering and subdivision technology.  Gone are the days where you can just paint detailed textures on a singl sided plane, and think it's going to render well in all these physically accurate render engines.  You need volume.

People's computers these days can handle high polygon counts.  We don't need to worry about choking the renderer.  This is the 64bit age.  We use 4000px textures, but we worry about using too many polys on a wall?

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.