In Chapter 2, Quick Walk Around Your Design, we explained how to load a default character controller, which is included with Unity. The behavior of character controllers is provided by script components. Normally, when you author a scene, you don't need to be concerned about the inner workings of the actual script. You merely assign variables and adjust parameters.
Many typical 3D action games use a first person perspective, where the camera is positioned to mimic the view through the characters own eyes. Sometimes, you also see your virtual hands or some kind of weapon, for example, Splinter Cell, Far Cry, or Half-Life. This is the recommended way to view an architectural model, as you can easily look around in all directions and it feels more immersive.
The alternative, which can be experienced in games such as Tomb Raider, Grand Theft Auto, or Assassin's Creed, is a third person perspective, usually showing the main character from slightly above...
