A microfacet-based BRDF generator

Michael Ashikmin, Simon Premože, Peter Shirley
2000 Proceedings of the 27th annual conference on Computer graphics and interactive techniques - SIGGRAPH '00  
A method is presented that takes as an input a 2D microfacet orientation distribution and produces a 4D bidirectional reflectance distribution function (BRDF). This method differs from previous microfacet-based BRDF models in that it uses a simple shadowing term which allows it to handle very general microfacet distributions while maintaining reciprocity and energy conservation. The generator is shown on a variety of material types.
doi:10.1145/344779.344814 dblp:conf/siggraph/AshikminPS00 fatcat:nibmaupk2veqbj2p6pm3i7jwx4