Hi, in UDK when u create a terrain u create a heightmap and then u add a terrain layer that goes with a terrain material. the terrain layer is something like a mask that shows where the material will be on the terrain. or where the grass is on the terrain.
when i was playing with UDK i had create some nice terrains.
In some way i add my heightmap, they imported little noise and i had to smooth them after, to make it at least look the same with that i had created.
and that i am asking is there any way to add the UDK layers in unity? or i have to paint them again form the start