Viewing & Rendering

Reflection Characteristics of Surfaces

Components of a simple illumination model
- Ambient reflection (a fudge factor)
- Diffuse reflection (light scattered equally in all directions)
- Specular reflections (mirror-like directed reflection)
Ambient reflection
- Independent of object position and viewer position
- constant
- Some light hits any surface from all other surfaces and light sources, and thus ensures that all visible surfaces get at least some light.
- I = IaKa
  - Ia: intensity of ambient light
  - Ka: fraction reflected (0 Ka 1)

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