It looks like you have a good number there. Can you create a more random variation in color brightness ,etc.
Thanks for the scene file. I'll load it up and see what I can do with it.
Meanwhile, here is a pic I did in Lightwave 7 about a year ago...it is the type of look I am trying to duplicate in Maya....
https://www.darrylworley.com/
https://www.defendamerica.mil/nmam.html