Rex Ray. The Promenade Space on the second floor of MCA Denver is both a passageway and an exhibition hall. Given its limited size and unconventional plan — the main wall runs diagonally to the windows opposite it — the Promenade has been used exclusively for single installations. The latest example is an untitled mural by San Francisco artist Rex Ray, who used to live in Colorado. Ray has a national reputation based not just on his fine art, but as a designer of everything from books to coffee mugs. Ray created the mural specifically for this show and specially designed the fabulous wallpaper that surrounds it. The mural is signature Ray, with shapes that rise from the base in the manner of a still-life or landscape. The shapes have been made from cut-outs of painted papers that have been laid against a stunning blue ground, and were inspired by organic forms, or at least abstractions of them, as seen in mid-century modern design. The wallpaper has a spare, all-over pattern on a white ground, complementing the mural without competing with it. Through January 31 at MCA Denver, 1485 Delgany Street, 303-298-7554, www.mcadenver.org.