Is it happening in vray IPR? It happens for me in IPR.
Strange I am using Max 2014, with latest FP beta 6.0.2 and if i set viewport display to pyramid and use IPR, I also get pyramids in the render, but normal render is fine..and I'm using Vray 3.60.04.
However, if I stop IPR and set to point cloud in the viewport, it renders just fine. Can't switch while using IPR though and DEFINITELY wouldn't suggest setting viewport to mesh, unless yo want to slow down the system to a crawl, especially with a large scene