If you see the polygons in Reality and Octane?
There is a problem with those renderers. => Use firefly.

Or use another renderer that can handle DAZ & Posers SubD and Posers Smoothing, set at crease angle 180°.

Remember; I have nothing against Hi Polycount.
But it has to be justified for the figures purpose. NOT to please the render engine.

Posers renderer & SubD & Smoothing, are as smooth as they come.
Even on as low as 2.000 poly figures.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!