To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S6. Variants of the surfaces shown in Movie S2 with superimposed specular reflections appropriate for each 3D shape interpretation. Note that the torus still appears more translucent than the bump when specular highlights are added. Perception and misperception of surface opacity Phillip J. Marlow, Juno Kim, and Barton L. Anderson PNAS. 2017. 114:13840-13845 DOI: 10.1073/pnas.1711416115 Download Original Video Browse All Videos »