@inproceedings{Ward2014MAM,
 author = {Greg Ward and  Murat Kurt and Nicolas Bonneel},
 title = {Reducing Anisotropic BSDF Measurement to Common Practice},
 booktitle = {Proceedings of the 2nd Eurographics Workshop on Material Appearance Modeling: Issues and Acquisition},
 series = {MAM '14},
 year = {2014},
 isbn = {978-3-905674-64-4},
 pages = {5-8},
 numpages = {4},
 url = {http://diglib.eg.org/EG/DL/WS/MAM/MAM2014/005-008.pdf},
 doi = {10.2312/mam.20141292},
 editor = {Reinhard Klein and Holly Rushmeier},
 address = {Lyon, France},
 publisher = {Eurographics Association},
 abstract = {We address the problem of measuring and representing reflection and transmission for anisotropic materials without relying on mathematical models or a large sample database. By eliminating assumptions of material behavior, we arrive at a general method that works for any surface class, from metals to fabrics, fritted glazing, and prismatic films. To make data gathering practical, we introduce a robust analysis method that interpolates a sparse set of incident angle measurements to obtain a continuous function over the full 4-D domain. We then convert this interpolant to a standard representation tailored for efficient rendering and supported by a common library that facilitates data sharing. We conclude with some remaining challenges to making anisotropic BSDF measurements truly practical for rendering}
}