Predicting reflectance functions from complex surfaces
SIGGRAPH '92 Proceedings of the 19th annual conference on Computer graphics and interactive techniques
Towards real-time photorealistic rendering: challenges and solutions
HWWS '97 Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware
A low distortion map between disk and square
Journal of Graphics Tools
A microfacet-based BRDF generator
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Illuminating micro geometry based on precomputed visibility
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
A data-driven reflectance model
ACM SIGGRAPH 2003 Papers
View-dependent precomputed light transport using nonlinear Gaussian function approximations
I3D '06 Proceedings of the 2006 symposium on Interactive 3D graphics and games
Real-time BRDF editing in complex lighting
ACM SIGGRAPH 2006 Papers
Interactive relighting with dynamic BRDFs
ACM SIGGRAPH 2007 papers
Frequency domain normal map filtering
ACM SIGGRAPH 2007 papers
Filtering and Rendering of Resolution-Dependent Reflectance Models
IEEE Transactions on Visualization and Computer Graphics
A precomputed polynomial representation for interactive BRDF editing with global illumination
ACM Transactions on Graphics (TOG)
Real-time editing and relighting of homogeneous translucent materials
The Visual Computer: International Journal of Computer Graphics
Fast, realistic lighting and material design using nonlinear cut approximation
ACM SIGGRAPH Asia 2008 papers
All-frequency rendering of dynamic, spatially-varying reflectance
ACM SIGGRAPH Asia 2009 papers
Physically-based interactive bi-scale material design
Proceedings of the 2011 SIGGRAPH Asia Conference
Interactive hair rendering and appearance editing under environment lighting
Proceedings of the 2011 SIGGRAPH Asia Conference
EGSR'09 Proceedings of the Twentieth Eurographics conference on Rendering
Fast estimation and rendering of indirect highlights
EGSR'10 Proceedings of the 21st Eurographics conference on Rendering
Bi-scale appearance fabrication
ACM Transactions on Graphics (TOG) - SIGGRAPH 2013 Conference Proceedings
Anisotropic spherical Gaussians
ACM Transactions on Graphics (TOG)
Inverse bi-scale material design
ACM Transactions on Graphics (TOG)
A practical algorithm for rendering interreflections with all-frequency BRDFs
ACM Transactions on Graphics (TOG)
Interactive appearance design in the presence of optically complex materials
MAM '13 Proceedings of the Eurographics 2013 Workshop on Material Appearance Modeling: Issues and Acquisition
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We present a new technique for bi-scale material editing using Spherical Gaussians (SGs). To represent large-scale appearances, an effective BRDF that is the average reflectance of small-scale details is used. The effective BRDF is calculated from the integral of the product of the Bidirectional Visible Normal Distribution (BVNDF) and BRDFs of small-scale geometry. Our method represents the BVNDF with a sum of SGs, which can be calculated on-the-fly, enabling interactive editing of small-scale geometry. By representing small-scale BRDFs with a sum of SGs, effective BRDFs can be calculated analytically by convolving the SGs for BVNDF and BRDF. We propose a new SG representation based on convolution of two SGs, which allows real-time rendering of effective BRDFs under all-frequency environment lighting and real-time editing of small-scale BRDFs. In contrast to the previous method, our method does not require extensive precomputation time and large volume of precomputed data per single BRDF, which makes it possible to implement our method on a GPU, resulting in real-time rendering.