Optical PU2902-4 is a wallpaper designed by Patricia Urquiola for Tres Tintas, in yellow and beige. Vertical stripes of varying weight that swell and narrow to form long diamond shapes, with a kaleidoscopic play of light and dark.

Tres Tintas describe it as a play between two graphic dimensions. The stripes lead the eye up the wall, and the diamonds appear as the lines shift. Made in Barcelona and printed to order.