Landscape Mountains Landscape Material

Hello,
I have recently been looking at the “Landscape Mountains” example provided by Epic.
More specifically I have only really been looking at the landscape material and I am a tad confused.
I havent’t been able to find any WorldMachine generated masks in the entire project.
The snow and most other textures are obviously using WorldMachine FlowMaps and other masks, yet I can’t see any of those masks in the project.
Any help on where to find those maps in the ContentBrowser and also where to find them being used in the actual Landscape Material would be greatly appreciated.

I looked through it a bit further and I still haven’t found where those masks are in the project. I checked through all the textures and their respective rgb and alpha channels and the masks weren’t there either. So at this point I believe there must be some hidden folders or something similiar.
Or, I am misunderstanding the landscape shaders entirely and somewhere there is a magic shader function that generates flowmaps on the fly (sarcasm).
So, anyone? Ideas?