![]() Donner and Jensen 2006 later introduce a two-layer model that still gives convincing results. We show a similar comparison in Figure 14-11, in Section 14.4.3, using our real-time system, which is capable of modeling this multilayer scattering. Donner and Jensen 2005 demonstrate that a single-layer model is insufficient and show the improvement obtained from using a three-layer model. Simulating scattering at this complexity is probably excessive, but realistic rendering requires modeling at least two distinct layers below the oily layer responsible for specular reflection. Real skin is even more complex medically, the epidermis alone is considered to contain five distinct layers (Poirer 2004). When playing The Sims 4, you never see a sims teeth between their lips when they aren’t smiling or eating. This is such a cute skin detail that will make your sims even cuter than they were before. Graphics researchers have produced very detailed models that describe optical scattering in skin using as many as five separate layers (Krishnaswamy and Baranoski 2004). The show some teeth skin detail allows you to see a bit of teeth between your sim’s lips when they are just hanging out. Complicating the process further, multiple layers within the skin actually absorb and scatter light differently, as shown in Figure 14-4. ![]()
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