Don't just dump files. Create a master folder on your computer:
Documents > V-Ray Materials > [Category] > Wood / Metal / Stone / Fabric
Then, use the V-Ray Asset Editor's "Add Folder to Library" option to pin this directory permanently.
Chaos Group (the makers of V-Ray) now includes Chaos Cosmos directly inside V-Ray 5 and 6 for SketchUp. Sketchup Vray Material Library Free Download
When searching for "Sketchup Vray Material Library Free Download," you will find two types of results: Don't just dump files
Before we dive into the downloads, let’s understand the value. Chaos Group (the makers of V-Ray) now includes
V-Ray for SketchUp uses a complex shader system. A single "Wood Floor" material might require four separate bitmap images (Color, Reflection, Glossiness, and Bump). Manually sourcing these maps and dialing in the settings (IOR, Fresnel, Subdivs) is tedious.
A dedicated V-Ray material library (.vismat files) saves these settings for you. With one click, you can apply a photorealistic marble, concrete, or fabric texture. It boosts your workflow speed by nearly 70%, allowing you to focus on composition and lighting rather than technical texture tweaking.
Since V-Ray works best with *.vismat files, use a free script: