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Alternatively, you can download it manually by executing the mtllib.exe file located in C:\Program Files\Chaos Group\V-Ray\3ds Max NNNN\bin. For 3ds Max 2022: C:\ProgramData\Autodesk\ApplicationPlugins\VRay3dsMax2022\bin.
The default download directory is C:\Users\USERNAME\Documents\V-Ray Material Library. If you need to change it, use the following command line:
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