Nov 9 - Cal 9: Surfaces and Effects

Light in leaves:
1. Transmitted light, with a strongly chromatic yellow-green color.
2. The leaf in shadow, facing downward. This is the darkest green. It would be even darker if it weren't picking up reflected light from the adjacent leaf seen edge-on.
3. The leaf in shadow, facing upward. These upfacing planes are blue-green because the blue light of the sky influences them.
4. Sunlight reflecting off the top surface of the leaf. This is the highest value, and the most textural, especially at the terminator. But the chroma is not very intense, because most of the light bounces of the waxy cuticle of the leaf.



Surface Subscattering: Light enters the skin or any translucent material and spreads out beneath the surface, creating an unmistakable glow. affects forms with depths and volume, such as a person's ear, a glass of milk, or a piece of fruit.




Color zones of the face: light skinned faced divide into three categories: forehead is light golden, forehead to bottom of the nose is reddish, from nose to chin is bluish, greenish, or grayish. (these zones can be almost imperceptible, but are more pronounced in men.)

HAIR:
-don't define hair too much or it will look like a string mop. group strands into masses
-if the edges are too hard, the hair will look like a leather helmet. look for a variation where the hair meets the skin, especially at the hairline hear the temple and where the hair meets the neck.
-visualize masses of hair in ribbons.
-when hair is short or pinned to the head, the highlight extends across the entire head
-use a large brush, keep the forms simple, and try to state the largest masses

Caustics: spots, arcs, or wavy bands of light projected onto a surface
Specular Reflection: light rays bounce off the surface at the same relative angle they approached it (mirror surface)
Diffuse Reflection: light rays bounce in all directions (matte surface)

Three Rules of Specularity:
1. the more reflective the surface, the broader the range of values you need to paint it.
2. Convex reflective surfaces, such as chrome, reflect a miniature view of the scene around the object, often including elements beyond the limits of your composition.
3. Whether you're rendering digitally or traditionally, the specular pattern is a separate layer added on top of the usual modeling factors that you use to render the object.

Highlights are never pure white! instead they are a combination of the color of the source and the local color of the object

photos vs color:
the human eye can see color in more detail than photographs pick up. make a color note if you take a photograph for reference

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