Explain how three-dimensional space in the live theatre is conceived and treated differently from ...

Because the stage is a three-dimensional space, the director has the advantage
of depth as well as breadth to work with. Through the use of platforms, they can also
exploit height on the stage. The theatrical director must use certain space conventions to
ensure maximum clarity. In the cinema, the director converts three-dimensional space
into a two-dimensional image of space. Even with deep-focus photography, depth is
not literal. But the flat image has certain advantages. A camera can be placed virtually
anywhere, so the film director is not confined to a stationary set with a given number of
walls.