IIRC, she uses Max which includes MentalRay. I think Autodesk provides it with Maya as well. FAIAK, VRay is used a lot for arch/viz, thouh not exclusively of course. The render engine in DAZ Studio, 3Delight is Renderman compliant, though I don't think that DS exposes all of the functionality. There is a plugin that is supposed to allow you to use DS to render with the full blown Pixar PRMan engine and other Render man compliant engines. Poser, all trse, whatever the renderer, there will always be the postwork vs. no postwork differences etc. he way back in Poser 4, exported .rib files for use in those renderers.

Whatever the renderer, there'll always be the postwork vs. no postwork debate etc. Some renderers allow you to do more in camera, like DOF that might otherwise have to be done in post.  

 

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