Advanced Lighting

Illumination:

Energy physics...

• Radiance: the flux of light energy in a given direction
• Geometry/Visibility: how light energy falls upon a surface
• BRDF: the interaction function of a surface point with light
• Energy Balance Equation: the local balance of energy in a scene

Approximation:

Hacks for interaction at a point...

• Ambient: approximating the global energy
• Lambertian: approximating the diffuse interaction
• Phong: approximating the specular interaction

 
• Reflection vs. Illumination
• Energy of Illumination
• Fast and Dirty Approximations
• Lambertian Reflection Model
• Phong Reflection Model
• Point Light Sources