Interstice is an improvisational installation which uses optical motion tracking and audio visual synthesis to create an immersive feedback environment. From improvisational gestures, the analyzed image transforms the participants' image into an exploration of space, image and sound. Low frequency audio, which is more felt than heard, is also generated from the viewer’s locomotion. This project explores the transforming interval, or interstice, between physical and virtual space, private and public space, internal and external psychological space as a recursionary loop.