p109fig03.29 The 3D percepts that are generated by chiaroscuro and trompe l'oeil both exploit the same kind of multiple-scale, depth-selective boundary webs that create the impression of a 3D bulge of the blue regions in the watercolor percept in <A HREF="images- Grossberg 2021/p108fig03.28 Baingio Pinna, Watercolor illusion filled-in regions bulge in depth, [multiple-scale, depth-selective] boundary web.png">Figure 3.28</a>.<BR>|| Chiascuro - Rembrandt self-portraitm  Trompe l'oeil - Graham Rust.