The eyes look dull because they&#x27;re using very simple rendering techniques. I&#x27;d guess that they could make the eyes much more realistic by adding some simple optical effects like specularity or diffraction (<a href="http:&#x2F;&#x2F;www.graphics.cornell.edu&#x2F;~westin&#x2F;misc&#x2F;fresnel.jpg" rel="nofollow">http:&#x2F;&#x2F;www.graphics.cornell.edu&#x2F;~westin&#x2F;misc&#x2F;fresnel.jpg</a>).<p>One interesting thing that I noticed at 1:45 is that visible teeth can really change a person&#x27;s appearance -- Bush doesn&#x27;t seem to use his teeth at all when he talks.