Indigara — Tanith Lee

Jet and her robot dog, Otis, have been taken to their planet's film capital, Ollywood, and are soon catapulted into the unplumbed underworld that lurks below the studios and lots. Here lies the beautiful and sinister otherwhere of Indigara, which has spontaneously generated from the sets, costumes, models, and actual celluloid of rejected pilot fantasy and SF movies that never got made into series. Even while girl and dog try to survive the dangers and terrors below, their Indigaran mirror images have replaced them, and are running amok in the real world above . . .