Unlike older versions where you had to download separate .vismat files, V-Ray 6 (for 3ds Max, SketchUp, Rhino, Revit, and Cinema 4D) includes a cloud-based, built-in asset system.
Windows Path: C:\Program Files\Chaos Group\V-Ray\Maya 20XX for x64\maya_vray\bin\mtllib.exe (or equivalent for 3ds Max/SketchUp). vray 6 material library link
Weekly Updates: New materials and 3D assets (furniture, vegetation, etc.) are added to the cloud library weekly. Unlike older versions where you had to download separate
V-Ray 6 Material Library: A Comprehensive Guide V-Ray 6 (for 3ds Max
Alternatively:
C:\ProgramData\Chaos Group\V-Ray Material Library (Less common for V6, usually legacy)