Unity3D Terrain Help [3DS Max]

Hey guys, I have just recently learnt how to create realistic terrains using 3DS Max, however, I want to somehow implement these models inside Unity and use them as a TERRAIN and not a MODEL. Is there ANY possible way I could convert this terrain model into a Unity3D Terrain in order to make adjustments, deformations and painting the terrain.

Thank you! (y)

How about using something like:

http://wiki.unity3d.com/index.php/Object2Terrain

which I believe will do exactly what you want.