Papers mentioned in the article: "An Improved Illumination Model for Shaded Display" (1978): http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.107.3997

Papers mentioned in the article: "An Improved Illumination Model for Shaded Display" (1978): http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.107.3997&rep=rep1&type=pdf http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.107... "A 3-Dimensional Representation for Fast Rendering of Complex Scenes" (1980): http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.133.6937&rep=rep1&type=pdf http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.133...