Plain muslin blue cyc. The perfect background for a heaven scene or a dance revue with extensive lighting effects.

A plain muslin blue cyc. A cyclorama is a large curtain or wall positioned at the back of the stage area. It was popularized in the German theater of the 19th century and continues in common usage today in theaters throughout the world. A "cyc" (US theatrical abbreviation) can be made of unbleached canvas (larger versions) or muslin (smaller versions), filled scrim (popularized on Broadway in the 20th century), or seamless translucent plastic (often referred to as "Opera Plastic").