SIGGRAPH '86 Proceedings of the 13th annual conference on Computer graphics and interactive techniques
SIGGRAPH '89 Proceedings of the 16th annual conference on Computer graphics and interactive techniques
Optimally combining sampling techniques for Monte Carlo rendering
SIGGRAPH '95 Proceedings of the 22nd annual conference on Computer graphics and interactive techniques
Rendering participating media with bidirectional path tracing
Proceedings of the eurographics workshop on Rendering techniques '96
Efficient simulation of light transport in scenes with participating media using photon maps
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Metropolis Light Transport for Participating Media
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A practical analytic single scattering model for real time rendering
ACM SIGGRAPH 2005 Papers
Image synthesis using adjoint photons
GI '06 Proceedings of Graphics Interface 2006
Radiance caching for participating media
ACM Transactions on Graphics (TOG)
Interactive multiple anisotropic scattering in clouds
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Unbiased, adaptive stochastic sampling for rendering inhomogeneous participating media
ACM SIGGRAPH Asia 2010 papers
A comprehensive theory of volumetric radiance estimation using photon points and beams
ACM Transactions on Graphics (TOG)
Real-time volumetric shadows using 1D min-max mipmaps
I3D '11 Symposium on Interactive 3D Graphics and Games
A mathematical framework for efficient closed-form single scattering
Proceedings of Graphics Interface 2011
Proceedings of the ACM SIGGRAPH Symposium on High Performance Graphics
Proceedings of the 2011 SIGGRAPH Asia Conference
Imperfect voxelized shadow volumes
Proceedings of the 5th High-Performance Graphics Conference
Joint importance sampling of low-order volumetric scattering
ACM Transactions on Graphics (TOG)
Photon beam diffusion: a hybrid Monte Carlo method for subsurface scattering
EGSR '13 Proceedings of the Eurographics Symposium on Rendering
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We introduce a set of robust importance sampling techniques which allow efficient calculation of direct and indirect lighting from arbitrary light sources in both homogeneous and heterogeneous media. We show how to distribute samples along a ray proportionally to the incoming radiance for point and area lights. In heterogeneous media, we decouple ray marching from light calculations by computing a representation of the transmittance function that can be quickly evaluated during sampling, at the cost of a small amount of bias. This representation also allows the calculation of another probability density function which can direct samples to regions most likely to scatter light. These techniques are orthogonal and can be combined via multiple importance sampling to further reduce variance. Our method has very modest per-ray memory requirements and does not require any preprocessing, making it simple to integrate into production ray tracing based renderers. © 2012 Wiley Periodicals, Inc.