I have been away over the weekend and have only just got back so haven't had a chance to work on this much lately but will post an update this evening

GecT- Thanks for that. So instead of a layered texture what would you use to texture a piece of terrain..? I have found it relatively easy to use and get the desired result. I wouldn't know how to texture any terrain if it wasn't for that node.

murambi- I will play around with the point density later and hopefully get an increase in my render times!

Do you think it would be worth taking this into mudbox and sculpting the terrain to add more details and then also use mib_binary proxies to render the high res terrain so I can still use the low res in viewport..? hmm lots more experimenting to do