Visitors encounter a large elliptical screen hanging above them. The screen, which appears to flicker and change as visitors move around it, presents a moiré pattern. This effect occurs wherever two or more similar patterns are overlaid and clash. It is familiar as an artefact in print and on screen, and, in the physical world, in meshes, fences, and facades. As viewers move about, the pattern appears to change with their shifting perspectives, encouraging them to move around even more. In this way, the work is a subjective and individual experience for everyone.

The shape of the elliptical screen also seems to change according to the viewer’s perspective. From particular vantage points, at either end of the space, the screen appears circular. As soon as visitors move left or right, forward or back, the illusion collapses and the elliptical shape becomes evident. The visual ambiguity of the ellipse has fascinated Eliasson for decades: an ellipse appears to be a foreshortened circle from certain perspectives; it is only through contextual clues and motion that it reveals its actual shape.