Lux, I see several of your models are featured on the front page of the Model Library over at Clara.IO.  They look great.  I opened a couple of them in a scene, and they looked fine.  I tested the beanbag and the Arbor Bench, and they both rendered very nicely with Vray Advanced in Clara, with maps and everything.

I noticed that when I imported the models, they contained triangulated faces, which I know you don't model them that way.  So I opened them from the OBJ I downloaded from your Turbosquid account, and also here on Rendo freestuff, and the same models in OBJ format were all quads, as expected.  Is the triangulation something you did on purpose for the Clara IO library, or did Clara's software somehow convert them to triangulated faces?

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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.