Optical M2911-1 is a wall mural designed by Patricia Urquiola for Tres Tintas, in yellow and beige. Fine vertical lines broken into small diamonds across the upper part, settling into plain stripes towards the foot.

Tres Tintas describe a diamond form with a kaleidoscopic effect. Up close the lines seem to shift with movement; from across a room they read as fine texture. Made in Barcelona and printed to order.