I am trying to export this rock model over to Unreal Engine 4. So far, i can import the mesh, but i cant figure out how to import the textures. keep in mind that the texture is mode purely from Nodes (veroni, noise ect) so importing the .png isnt possible
[![this is the rock that i have created using blender.][1]][1]


[![These are the nodes i have used to create the texture][2]][2]


  [1]: https://i.sstatic.net/NWNWh.jpg
  [2]: https://i.sstatic.net/WbDGs.png

just to clarify, i would like to import the textures, made purely using nodes, into Unreal Engine 4 (if possible). 
Thanks