In 1966 Turrell moved into a building formerly known as the Mendota Hotel in Ocean Park, California, where he embarked on a groundbreaking series of works exploring the ways light can manipulate the perception of space, grouping them into broad categories based on similarities in structure and perceptual effects. In Afrum I (White) (1967), one of the earliest of what Turrell calls Cross Corner Projections, visitors encounter a glowing cube floating in the corner of a room; what first appears to be a solid object resolves upon closer inspection into simple planes of light.