A Survey of Real-time Shading Models

A Survey of Real-time Shading Models
Author: Karsten Schwenk
Description: This article presents a survey of popular shading models used in 3D computer graphics and discusses their application to real-time applications, including games. Each shading model is analyzed in terms of computational costs, scalability, realism, applicability, advantages/disadvantages, and other factors.

That work is simply great, despite the amount of math and phys in it. It presents in a structured form much of the research work in the field.

I second that. The funny thing is that I recently considered creating something similar myself, when I was reading about the various shading models, and wasn't able to find such a survey.