VRayDirt - simulates shading around corners and crevices of objects based on a radial distance. VRayDirt can be used to produce a variety of effects, including ambient occlusion renderings.
Interpolation (Reflections and Refractions) -accelerates rendering by approximating and caching the effects of glossy reflections and refractions.
IES Light - uses photometric data to provide accurate light definition.
Sphere Light - adds a spherical area light to the V-Ray 1.5 for Rhino toolset.
Additional Parameters such as roughness for diffuse BRDFs, along with exit color and max. depth for reflections and refractions, provide new levels of control when creating materials in V-Ray 1.5 for Rhino.
Improved Rhino Integration
V-Ray 1.5 for Rhino supports the RDK Sun and can be used in conjunction with the VRaySun/ Sky system.
V-Ray 1.5 for Rhino supports the 32 and 64 bit versions of Rhino 5.0. as well as the 32 bit version of Rhino 4.0