A comprehensive physical model for light reflection
Proceedings of the 18th annual conference on Computer graphics and interactive techniques
Measuring and modeling anisotropic reflection
SIGGRAPH '92 Proceedings of the 19th annual conference on Computer graphics and interactive techniques
The RADIANCE lighting simulation and rendering system
SIGGRAPH '94 Proceedings of the 21st annual conference on Computer graphics and interactive techniques
Non-linear approximation of reflectance functions
Proceedings of the 24th annual conference on Computer graphics and interactive techniques
An anisotropic phong BRDF model
Journal of Graphics Tools
An improved illumination model for shaded display
Communications of the ACM
Illumination for computer generated pictures
Communications of the ACM
Models of light reflection for computer synthesized pictures
SIGGRAPH '77 Proceedings of the 4th annual conference on Computer graphics and interactive techniques
A reflectance model for computer graphics
SIGGRAPH '81 Proceedings of the 8th annual conference on Computer graphics and interactive techniques
An anisotropic BRDF model for fitting and Monte Carlo rendering
ACM SIGGRAPH Computer Graphics - Visual Research, Evaluation and Assessment in the Age of Computer Graphics
Experimental analysis of BRDF models
EGSR'05 Proceedings of the Sixteenth Eurographics conference on Rendering Techniques
Basics of physically-based rendering
SIGGRAPH Asia 2012 Courses
Representing BRDF by wavelet transformation of pair-copula constructions
Proceedings of the 28th Spring Conference on Computer Graphics
OpenSurfaces: a richly annotated catalog of surface appearance
ACM Transactions on Graphics (TOG) - SIGGRAPH 2013 Conference Proceedings
Basic concepts of physically-based rendering
SIGGRAPH Asia 2013 Courses
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Due to its realistic appearance, computational convenience, and efficient Monte Carlo sampling, Ward's anisotropic BRDF is widely used in computer graphics for modeling specular reflection. Incorporating the criticism that the Ward and the Ward-Dür model do not meet energy balance at grazing angles, we propose a modified BRDF that is energy conserving and preserves Helmholtz reciprocity. The new BRDF is computationally cheap to evaluate, admits efficient importance sampling, and thus sustains the main benefits of the Ward model. We show that the proposed BRDF is better suited for fitting measured reflectance data of a linoleum floor used in a real-world building than the Ward and the Ward-Dür model.