I am well aware of the existence of Blinn-Phong shading, which is a great tool when you are doing, for example, modelling algorithms and wan't to focus on the model. In this case a full BRDF result, even if fast, could make it harder to appreciate the geometry you are analysing.
On the other end of the spectrum, we have full BRDF approximations through monte-carlo algorithms and ray traycing. Which give amazing results, but are very slow.
I have tried to look for, but haven't found,a list of commonly used algorithms that have different levels of trade off between quality and speed.
Does anyone know of a resource where I can find some algorithms, their performance and quality?