In those days I was testing Forest Pack capabilities. Unfortunately seems that its embedded materials doesn't respond too much to the Octane conversion...no way, at least for me, to use directly Octane Materials when placing some native Forest pack geometry (an octane conversion is always needed).
During the conversion of Forest Pack materials into octane's I found a trick for applying a sort of "multy texture" to the geometry scattered with Forest Pack and assing randomly to it.
The trick consist few steps:
1) create a "Multy sub Object" Material with all the materials needed (...unfortunately this method doesn't work with only textures, but with materials)
2) assign the material to the Forest pack object (material apply image )
3) check the box "mesh" into the "display" section of Forest Pack (display image)
4) add a "material by element" modifier to the Forest Pack scatter, check "random distribution" and set the number of material you have created in the "Mutly sub Object" material (material by element image)
5) enjoy
