What is the name of the back wall of the stage that can be painted or lit?

The name of the back wall of the stage that can be painted or lit is the cyclorama, often referred to as a "cyc." This structure serves as a backdrop for performances and can be utilized in various ways to enhance the visual atmosphere of a production. It is typically large and curved, designed to wrap around the stage's back, allowing for seamless lighting effects and painted scenery.

The cyclorama can be lit in different colors or patterns to create mood or simulate environments, making it a versatile tool in a production’s visual storytelling. Its ability to transform the backdrop aligns well with the dynamic nature of theater, where visual elements play a critical role in supporting the narrative.

Understanding its function helps in recognizing how crucial the cyclorama is for enhancing the audience's emotional engagement and for setting the overall tone of a performance.