I propose the Terrain have options for interactions, such as dig, erode and explode other than just pushing around the mesh but actually creating soil that can be set up to a depth, giving the terrain a full x, y, z spectrum.
In the initial mapping process the Terrain can be modeled and manipulated as a mesh for ease of development, however, upon reaching a point the developer can select an element of the Terrain which sets the depth of the soil and fills in the space creating a global object.
This can assist in the creation of digger games, games that will utilize destructible objects and want to give greater depth as well as enhance the viability of Unity 3D as a lead development tool ^.^
Comments and support is welcome.
Thank you for your time and consideration of these matters at hand.