01238nas a2200133   4500008004100000245005400041210005400095260003300149520077800182100002500960700002300985700002101008856007501029       2009                        eng d00aSimulating Complex Window Systems Using BSDF Data0 aSimulating Complex Window Systems Using BSDF Data  aQuebec City, Canadac06/20093 a<p>Nowadays, virtual models are commonly used to evaluate the performance of conventional window systems. Complex fenestration systems can be difficult to simulate accurately not only because of their geometry but also because of their optical properties that scatter light in an unpredictable manner. Bi-directional Scattering Distribution Functions (BSDF) have recently been developed based on a mixture of measurements and modelling to characterize the optics of such systems. This paper describes the workflow needed to create then use these BSDF datasets in the Radiance lighting simulation software. Limited comparisons are made between visualizations produced using the standard ray-tracing method, the BSDF method, and that taken in a full-scale outdoor mockup.</p>1 aKonstantoglou, Maria1 aJonsson, Jacob, C.1 aLee, Eleanor, S.  uhttps://facades.lbl.gov/publications/simulating-complex-window-systems