The first time you open the left panel of the Asset Editor after installing V-Ray for Revit, you will be presented with the option to download the Preset Material Library. Note that you need about 8.5 GB of free disk space to download it.
The assets are saved in \Documents\V-Ray Material Library\ on Windows or ~/Library/Application Support/ChaosGroup/V-Ray Material Library on macOS.
Once the download is complete, the library assets remain permanently available.
If a previous installation of V-Ray 5 for 3ds Max Revit is detected, the Preset Material Library will be saved in the already specified location.
Asset files are shared between other V-Ray products if they are also installed on the system, e.g. V-Ray 5 for 3ds Max and V-Ray 5 for Rhino.
Note that the first time the Preset Material Library is opened during a new Revit session, V-Ray connects to the Chaos servers to validate the completeness of the downloaded assets and check for updates. If a connection cannot be established, you can choose to proceed using the assets that are already available on your hard drive.
