this is awesome, i really like the way its going. I'm doing something similar but in Marmoset Toolbag 2 but the results you've gotten from UE4 seem intriguing :)
@JAMESMEADER Thanks! Its too much stress to do it in Marmoset. I'd use Toolbag for smaller scenes. UE4 provides much more control :) @XHI C: I used in-engine landscape painting system. I created a terrain material which has various textures, and "sprayed" or blended them on the landscape. :)