In 2003, Stephen Palmisano and his colleagues flew people through a cloud of dots on a big screen. They held a button for as long as they felt they were moving. When the camera itself jittered, near dots jumped further than far ones, the way they do when a real camera moves, and the feeling started in about half the time. When they shifted the whole picture by the same amount instead, like a TV shake, it did nothing. The cost: in ten-minute runs, a bobbing view nearly doubled how sick people said they felt.

The wood, the snow, the lab and the stand-in are our own models, built and lit in code.

Shake the camera, not the picture. Smooth, or shaken?

Sources: Palmisano, Burke and Allison, "Coherent perspective jitter induces visual illusions of self-motion", Perception 32 (2003); Palmisano, Bonato, Bubka and Folder, Aviation, Space, and Environmental Medicine 78 (2007).
Music: our own, played on GarageBand instruments. Sounds: made by us.