Grapes, cherrys and the eyeball
available in any other way. Indeed it is possible to introduce this effect deliberately by
changing the position of the highlight and thus transforming a dull eye into a live one. Often I
introduce highlights into the eyes even when it is optically impossible, or when the light source
was not even reaching the eye. I consider the employment of such a device to be a legitimate
conceit and a method sometimes necessary in portraiture. The fact that, scientifically, the
angle is 180 degrees is dependent on the eye being spherical. Unfortunately there are two
spheres that contain the surface of the eye which complicates the angle of reflection even
more.You'd turn a cherry into a grape by adding the transmitted light to the side opposite the light's
entry point. A grape is translucent; a cherry is not. Light travels through a grape.
You'd also diffuse the highlight a bit more to indicate a less glossy surface. The highlight is the
reflection of the light source on the surface, and the degree to which it is diffused indicates the
texture of the surface. You might contrast edgy polished metal one the one extreme with soft
velvet on the other, for example.http://www.geocities.com/~jlhagan/advanced/the_eye.htm (2 of 3)1/13/2004 3:38:02 AM