Link: Vray 6 Material Library

| Feature | V-Ray 5 Library | V-Ray 6 Library | | :--- | :--- | :--- | | | 2K | 4K (Standard) | | Decal Support | No | Yes | | File Format | .vrmat (Legacy) | .vrmat (Updated shader graph) | | Size | ~35 GB | ~52 GB | | Link Protocol | HTTP 1.1 | HTTPS / CDN (Faster) |

and click on the Chaos Cosmos Browser button. Navigate to the Materials section in the browser sidebar. vray 6 material library link

Yes. The library is host-agnostic.