One very important fact about Poser and DAZ|Studio rendering:  Light in renders does not do what you think it does.  It does not bounce, it does not spread and backlight a given object.  You can fake this with materials (difficult imo) or a low-power Infinite light (much easier, and less convincing) but except for IBL, things that don't have a light shining directly on them will be black, which tends to give Poser renders a very hard look.  This is why Greypixel's images look so great (and you'll see similar great quality also in Vince's renders), because much effort has gone into getting away from that very unrealistic hard black shadowing.

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