A visualisation of the Douglas-Rachford Algorithm created by Matthew P. Skerritt and Scott Lindstrom as part of research conducted with Jonathan M. Borwein, Brailey Sims, and Anna Schneider.
This picture is used in the main poster for Australian Mathematical Society special interest group Mathematics of Computation and Optimization (MoCaO). A variant of it was featured at the Bridges Math Art conference in Stockholm, Sweden.
Other visualisations by Scott Lindstrom can be found on his web page. Other visualisations by Matthew P. Skerritt will be available on his upcoming web page.