Directed by Anton Corbijn, the new documentary SQUARING THE CIRCLE (THE STORY OF HIPGNOSIS) follows the relationship of Storm Thorgerson and Aubrey ‘Po’ Powell, the two men who formed Hipgnosis, one of the most influential album art companies in history. Working together during the Rock n’ Roll Revolution of the 60s and 70s, Powell and Storm worked with some of the biggest bands in the world to create images that have stood the test of time, ranging from Wings to Pink Floyd to Led Zeppelin. In this 1on1, we speak to Powell about the definition of great art, the energy of the era and our changing view of images.