Scrim

Robert Irwin (b.1928), Scrim veil—Black rectangle—Natural light, Whitney Museum of American Art, New York, 1977. Cloth, metal, and wood, 144 × 1368 × 49 in. (365.8 × 3474.7 × 124.5 cm). Whitney Museum of American Art, New York; gift of the artist 77.45. Photograph © Warren Silverman, 1977

Source:  Whitney