What are "pichhwais" in the Nathdwara school of painting?

Large backdrops painted on cloth

Answer: Large backdrops painted on cloth
Large backdrops called pichhwais were painted on cloth for the deity Shrinathji in Nathdwara.

Nathdwara, a town close to Udaipur and a prominent Vaishnava centre, also emerged as a school of painting in the late seventeenth century. Large backdrops called pichhwais were painted on cloth for the deity, Shrinathji, for several festive occasions.