Two or more cameras or move the main camera. I would normally go for two cameras.
If you want to you can also have them both rendering at the same time too. So you can have the terrain view the whole screen and have a smaller rendering for a top view to give you a “map view” type of thing.
The code below will allow you to toggle which camera using the “C” key:
// Add cameras to the object in the editor
public var camlist: Camera[];
function Update()
{
if(Input.GetKeyDown(KeyCode.C))
{
Debug.Log("Change Camera");
for( var cam: Camera in camlist)
{
cam.enabled=false;
}
currentCam++;
if(currentCam >= camlist.Length)
{
currentCam=0;
}
camlist[currentCam].enabled=true;
}
}