@techreport{snyder1996area,
author = {Snyder, John},
title = {Area Light Sources for Real-Time Graphics},
year = {1996},
month = {March},
abstract = {In an effort to extend the sorts of lightning models used in real-time computer graphics, this paper presents several area light source 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 also be used to represent illumination from finite-distance spherical light sources. The models are not unduly more expensive than the simple point light source models, and are capable of real-time evaluation.},
url = {http://approjects.co.za/?big=en-us/research/publication/area-light-sources-for-real-time-graphics/},
pages = {30},
number = {MSR-TR-96-11},
}