VrayMtl Copy Maps
This script is intended to batch copy from slot to slot within the same material.
For example, you can copy the bump map to The displacement map or the diffuse map to the selfillumination map on multiple material at once.
You can copy the diffuse map to the bump or the Glossiness map and use my other script to add color correction with saturation set to -100 and adjust other settings to fit your needs.
It can also be used to remove some maps, by selecting an empty material slot in the "copy from" it will "copy" the empty slot to the destination slot.
Installation, drag and drop in the viewport, then go to customize, customize user interface, tool bar, category "SimonScripts"