The Chaos Group has released V-Ray 3.1 for Maya with 100 new and modified features

The new release includes Maya 2016 (pictured) compatibility, numerous V-Ray RT GPU enhancements and two VR cameras. 

The free update also includes better handling of proxy objects, an updated Light Cache algorithm which helps remove light leaks and improve animation and faster rendering of dynamic meshes, proxy objects.

V-Ray 3.1 for Maya also adds new stereoscopic camera types that will render 6x1 cube maps and spherical images for VR projects.