Permanent sets can be used in a variety of ways to create different effects. They can be used to represent a single location, or they can be used to create a sense of continuity throughout the play. They can also be used to create a specific mood or atmosphere. For example, a permanent set that is dark and foreboding could be used to create a sense of suspense or mystery, while a permanent set that is bright and cheerful could be used to create a sense of optimism or hope.
Permanent sets can be very versatile, and they can be used to create a wide variety of different theatrical experiences.