On October 26th, Monday, the newest build, V-Ray® 1.50 Service Pack 4, Vray 1.5 sp4

The upgrade is free of charge for all current V-Ray customers of Chaos Group.The V-Ray® 1.50 Service Pack 4 is compatible with Autodesk® 3ds Max® 8, Autodesk® 3ds Max® 9, Autodesk® 3ds Max® 2008, 3ds Max® 2009, Autodesk® 3ds Max Design 2009, Autodesk® 3ds Max® 2010, Autodesk® 3ds Max® Design 2010.

The new V-Ray build supports both 32-bit and 64-bit OS.
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Added New Feature in V-Ray 1.50 SP4 is V-Ray Ambient Light.

It includes several modified features:

-  Improved multithreading on multi-core machines;
-  Ability to specify gizmo falloff for VRayEnvironmentFog;
-  Ability to use arbitrary meshes as gizmos for VRayEnvironmentFog;
-  Option to exclude the background from VRayEnvironmentFog;
-  Added CIE sky models to the VRaySun and VRaySky;
-  It is now possible to submit DR servers list for DR through backburner;
-  Added option to not use area speculars in the VRayIES light;
-  Added Kelvin temperature settings for the color of VRayLights;
-  VFB history is now turned off when 3ds Max is in slave mode;
-  Output .vrimg and split channel paths are listed in the Asset Tracker;
-  GI cache files (irradiance maps, light cache etc) are listed in the Asset Tracker.