Global Illumination
Is the [see page 11, problem] of accurately and realistically rendering the lighting of a scene. Both phong-illumination and ray-tracing are attempts to approximate this.
This can be accurately canted as the rendering-equation (Warn: this equation doesn't cover all aspects of lighting) which consists of:
| Term | Description |
|---|---|
| Emmited spectral radiance | |
| BRDF | |
| Inward spectral radiance | |
| Lambert |
The essential idea is for each point x we want to find the incidence and intensities of all rays leading to that point (multiplied by some reflectance property).