Robert Irwin plays with light and dark in Marfa

At the end of June, Robert Irwin put the finishing touches to his project at the Chinati Foundation, Marfa, the art complex founded by the artist Donald Judd on a former army base in western Texas. The first new permanent single-artist installation at the site in 16 years, Irwins project is due to be publicly unveiled on 23 July.
The 87-year-old California artist has been having something of a revival in recent years, with major exhibitions at the Hirshhorn Museum in Washington, DC and Dia: Bea