Vray materials are configured properly.
In vray version, BRDF materials are installed in Microfacet GTR / GGX, vray owners below version 3.1 sp1 need to install BRDF in Blinn. For Corona render, it is recommended to install a version not lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR.
TO MAC USERS: If RAR password doesn't work, use this archive program:
RAR Expander 0.8.5 Beta 4 and extract password protected files without error.
TO WIN USERS: If RAR password doesn't work, use this archive program:
Latest Winrar and extract password protected files without error.