This function allows to automatically create PBR materials, from texture maps exported from texturing solutions like Substance (by Allegorithmic).
Here is how it works:
1) Choose the directory containing the texture maps. The maps should be PNG files only.
2) The scene should contain an Occurence named OccurrenceName, on which a PBR material named MaterialName will be applied
3) PNG maps should be named this way: OccurenceName_MaterialName_MapType.png
4) The type of maps supported are the following ones, and they should be written exactly like this: