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To initiate the download process of V-Ray Material Library, run the mtllib tool located in:

C:\Program Files\AutodeskChaos Group\Maya20XX for x64\vray\bin\ (for Windows users); also available from the Start menu.

/usr/autodesk/maya20XXChaosGroup/V-Ray/Maya20XX-64/vray/bin/ (for Linux users)

/Applications/ChaosGroup/AutodeskV-Ray/maya20XXMaya20XX/vray/binVRay.app/Contents/MacOS(for macOS users)

When working with installation from .zip or portable installation, the mtllib file resides in your archived folder:

Win: unpack_zip_folder\maya_vray\bin\mtllib.exe

Linux: unpack_zip_folder/maya_vray/bin/mtllib.bin

macOS: unpack_zip_folder/maya_vray/bin/mtllib.bin 

The default download directory for Windows users is C:\Users\USERNAME\Documents\V-Ray Material Library or /home/USERNAME/Documents/V-Ray Material Library on Linux and macOS. If you need to change it, use the following command line:

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set VRAY_MTLIB_DOWNLOAD_DIR="C:\path\to\mtllib"

For Linux and macOS users the commands for changing the default material library location are the same.

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