The purpose of stage treatment is to block the view of the audience from specific areas of the stage.  Stage curtains come in a variety of types, including front curtains, masking curtains, cross-stage curtains, and backdrop curtains. To alter a performance’s ambience and visuals, there are also acoustic curtains and curtain effects. Various types of stage curtains support the delivery of a magical, breath-taking performance in various ways on different areas of the stage. Each curtain has its own role, material and unique effect.