Are your 3D primitive’s nurb flange-sprockets correctly twiggled? val3dity: geometric validation of GML 3D primitives is a free tool to make sure your 3D primitives are the right shape. Exactly the right shape. Apparently there are formal standards for such things.
Carrara 8 is DAZ Studio's official 'big sister' software.
Carrara loads all DAZ and Poser characters and scenes,
and supports LuxRender for top-quality realistic rendering.