p116fig03.40 A combination of T-junctions and perspective cues can create a strong percept of depth in response to 2D images, with a famous example being Leonardo da Vinci's painting of the Mona Lisa.<BR>|| p116c2h0.05 "... Many Renaissance artists learned how to use <I>perspective cues</i> ... Renaissance artists also undeerstood how to use T-junctionslike the ones that occur where the vertical and horizontal edges intersect in Figure 3.40 (left column, bottom row), or in the Kanizsa square percepts in <A HREF="images- Grossberg 2021/p090fig03.03 Kanizsa square and reverse-contrast Kanizsa square precepts.png">Figure 3.3</a>, or in the zebra image in <A HREF="images- Grossberg 2021/p104fig03.21 Four examples of how emergent boundaries can form in response to different kinds of images.png">Figure 3.21b</a>.