Area Light Sources for Real-Time Graphics

In an effort to extend the sorts of lighting models used in real-time computer graphics, this paper presents several area lightsource models, including Lambertian and Phong illumination from constant and cosine-falloff hemispherical light sources,constant subhemispherical light sources, and constant polygonal light sources. The subhemispherical lighting model can alsobe used to represent illumination from finite-distance spherical light sources. The models are not unduly more expensive than...