Transmitted light: when light travels through thin or semi transparent material it becomes richly colored vs bouncing light is dull.
Four types of light on leaves:
1-Transmited light strong chromatic color
2 leaf in shadow, it's dark where reflected light can't reach it as well. DOWN more green because they are getting light from the sun.
3 Leaf in shadow facing up, has blue in it from reflected light from the sky. UP.
4 is the sunlight reflecting off the top and highest value but less chroma because the surface is waxy so we see more reflection.
When painting trees leaves react the same way but in groups instead of individually.
Subsurface Scattering:
When light enters skin or any translucent material and spreads out beneath the surface creating a glow. Requirements: translucent flesh, small forms, and backlighting.
Color Zones of the Face:
Hair:
Keep the masses simple, soften the edges, and control the highlights
Highlights go across the curve not along it!
Caustics
When water causes light to focus into rays, spots, or lines. (like a class of water or underneath the water or the glass)
Caustics from Transparent objects: light bounces up and forms lines along the boundary of geometric shapes depending on the curvature of the object.
Underwater:
They don't occur more than twenty or thirty feet below the surface. Only visible on the tops of surfaces under the water.
Caustic Reflections:
reflections from water glass or metal can be cast upwards.
Specular Reflections:
An object with a shiny surface will reflect the objects around it.
Diffuse reflection is light bouncing off a matte surface.
Rules: The more reflective the surface the broader the range of values
Convex reflected surfaces like chrome reflect a miniature view of what's around it and more than what's in the composition.
The specular pattern is separate layer added on top of the usual modeling factors
Highlights:
Specular Highlights
Annular Highlights
Color Corona:
When light is super bright the area color around it
Motion Blur:
Camera stays still and object is moving or speed blur as the camera moves along with an fast moving object. Speed blur the background blurs radially from the vanishing point! Only lines perpendicular blur
Photos vs observation
Photos loose color and darken shadows. Cameras can't catch everything we see.
Tuesday tips!
Clear silhouette turn your pose into a silhouette and if it doesn't read its not a good pose Separate objects to clarify and use shapes to point to things.
Check your value:
Check the values of your image for the right level of contrast, no matter how many colors you use your image will read.
