Source : Cg-source  https://cg-source.com/

How to use: Copy and paste the file MultiTexture_max20xx_ver2.01_32bit.dlt to C:\Program Files\Autodesk\3ds Max 20xx\Plugins

Description: MultiTexture Map is a plugin for 3dsmax that loads multiple textures and assigns them randomly, either by object or by material ID. With controls to randomly adjust the gamma, hue and saturation.