Chris Wyman ![](/sites/default/files/person/chrisCrop.png) [Chris Wyman](http://cwyman.org/) joined NVIDIA Research in 2012, and works from the Redmond, WA office in the real-time rendering research group. Before joining NVIDIA, he was an associate professor of computer science at the [University of Iowa](https://cs.uiowa.edu/). He has a Ph.D. in computer science from the [University of Utah](https://www.cs.utah.edu/) and a BS from the [University of Minnesota](https://cse.umn.edu/cs). Broadly, his research focuses on realistic, real-time rendering algorithms, especially related to lighting, global illumination, shadows, participating media, materials, and related issues. Recent research explores uses of real-time ray tracing given very limited ray budgets. This led to powerful stochastic sampling techniques like [ReSTIR ](https://research.nvidia.com/publication/2020-07_Spatiotemporal-reservoir-resampling)and NVIDIA's [RTXDI SDK](https://developer.nvidia.com/rtxdi), which builds on insights gleaned from stochastic and deterministic filtering for [post-process reconstruction](https://research.nvidia.com/publication/2017-07_Spatiotemporal-Variance-Guided-Filtering%3A), [order-independent transparency](https://research.nvidia.com/publication/2016-06_Exploring-and-Expanding), [antialiasing](https://research.nvidia.com/publication/decoupled-coverage-anti-aliasing), [alpha-testing](https://research.nvidia.com/publication/hashed-alpha-testing), and [geometry](https://research.nvidia.com/publication/2018-08_Correlation-Aware-Semi-Analytic-Visibility). He has also spent time [evangelizing real-time ray tracing](http://cwyman.org/papers/rtg2019_Ch3_IntroductionToDirectXRaytracing.pdf), including in [SIGGRAPH courses](http://rtintro.realtimerendering.com/) and [DirectX Raytracing code tutorials](http://cwyman.org/code/dxrTutors/dxr_tutors.md.html). Research Area(s) [Computer Graphics](/research-area/computer-graphics) [High Performance Computing](/research-area/high-performance-computing) [Real-Time Rendering](/research-area/real-time-rendering) Main Field of Interest [Computer Graphics](/research-area/computer-graphics) ### Publications ### 2024 [Decorrelating ReSTIR Samplers via MCMC Mutations](/index.php/publication/2024-07_decorrelating-restir-samplers-mcmc-mutations) Rohan Sawhney, [Daqi Lin](/index.php/person/daqi-lin), [Markus Kettunen](/index.php/person/markus-kettunen), [Benedikt Bitterli](/index.php/person/benedikt-bitterli), [Ravi Ramamoorthi](/index.php/person/ravi-ramamoorthi), [Chris Wyman](/index.php/person/chris-wyman), [Matt Pharr](/index.php/person/matt-pharr) [Area ReSTIR: Resampling for Real-Time Defocus and Antialiasing](/publication/2024-07_area-restir-resampling-real-time-defocus-and-antialiasing) Song Zhang, [Daqi Lin](/person/daqi-lin), [Markus Kettunen](/person/markus-kettunen), Cem Yuksel, [Chris Wyman](/person/chris-wyman) [ACM Transactions on Graphics (SIGGRAPH 2024)](https://doi.org/10.1145/3658210) ### 2022 [Generalized Resampled Importance Sampling: Foundations of ReSTIR](/index.php/publication/2022-07_generalized-resampled-importance-sampling-foundations-restir) Daqi Lin, [Markus Kettunen](/index.php/person/markus-kettunen), [Benedikt Bitterli](/index.php/person/benedikt-bitterli), Jacopo Pantaleoni, Cem Yuksel, [Chris Wyman](/index.php/person/chris-wyman) [ACM Transactions on Graphics (SIGGRAPH 2022)](https://s2022.siggraph.org/) ### 2021 [Fast Volume Rendering with Spatiotemporal Reservoir Resampling](/index.php/publication/2021-11_fast-volume-rendering-spatiotemporal-reservoir-resampling) Daqi Lin, [Chris Wyman](/index.php/person/chris-wyman), Cem Yuksel ACM Transactions on Graphics (SIGGRAPH Asia 2021) [Rearchitecting Spatiotemporal Resampling for Production](/publication/2021-07_rearchitecting-spatiotemporal-resampling-production) [Chris Wyman](/person/chris-wyman), Alexey Panteleev [ACM/EG Symposium on High Performance Graphics](https://www.highperformancegraphics.org/2021/) ### 2020 [Glossy Probe Reprojection for Interactive Global Illumination](/publication/2020-11_glossy-probe-reprojection-interactive-global-illumination) Simon Rodriguez, Thomas Leimkühler, Siddhant Prakash, [Chris Wyman](/person/chris-wyman), Peter Shirley, George Drettakis ACM Transactions on Graphics (SIGGRAPH Asia 2020) [Spatiotemporal reservoir resampling for real-time ray tracing with dynamic direct lighting](/publication/2020-07_spatiotemporal-reservoir-resampling-real-time-ray-tracing-dynamic-direct) Benedikt Bitterli, [Chris Wyman](/person/chris-wyman), [Matt Pharr](/person/matt-pharr), Peter Shirley, [Aaron Lefohn](/person/aaron-lefohn), Wojciech Jarosz ACM Transactions on Graphics (SIGGRAPH 2020) ### 2018 [Correlation-Aware Semi-Analytic Visibility for Antialiased Rendering](/publication/2018-08_correlation-aware-semi-analytic-visibility-antialiased-rendering) [Cyril Crassin](/person/cyril-crassin), [Chris Wyman](/person/chris-wyman), Morgan McGuire, [Aaron Lefohn](/person/aaron-lefohn) [HPG ’18: High-Performance Graphics](http://www.highperformancegraphics.org/2018/) ### 2017 [Spatiotemporal Variance-Guided Filtering: Real-Time Reconstruction for Path-Traced Global Illumination](/publication/2017-07_spatiotemporal-variance-guided-filtering-real-time-reconstruction-path-traced) Christoph Schied, Anton Kaplanyan, [Chris Wyman](/person/chris-wyman), Anjul Patney, Chakravarty R. Alla Chaitanya, John Burgess, Shiqiu Liu, Carsten Dachsbacher, [Aaron Lefohn](/person/aaron-lefohn), Marco Salvi Proceedings of High Performance Graphics 2017 [Generating stratified random lines in a square](/index.php/publication/2017-06_generating-stratified-random-lines-square) Peter Shirley, [Chris Wyman](/index.php/person/chris-wyman) [Journal of Computer Graphics Techniques](http://jcgt.org/published/0006/02/03/) [Hashed Alpha Testing](/publication/2017-02_hashed-alpha-testing) [Chris Wyman](/person/chris-wyman), Morgan McGuire [ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games (I3D'17)](http://i3dsymposium.github.io/2017/) ### 2016 [Towards Foveated Rendering for Gaze-Tracked Virtual Reality](/publication/2016-12_towards-foveated-rendering-gaze-tracked-virtual-reality) Anjul Patney, Marco Salvi, [Joohwan Kim](/person/joohwan-kim), Anton Kaplanyan, [Chris Wyman](/person/chris-wyman), Nir Benty, [David Luebke](/person/david-luebke), [Aaron Lefohn](/person/aaron-lefohn) ACM Transactions on Graphics (Proceedings of SIGGRAPH Asia) [Perceptually-Based Foveated Virtual Reality](/index.php/publication/2016-07_perceptually-based-foveated-virtual-reality) Anjul Patney, [Joohwan Kim](/index.php/person/joohwan-kim), Marco Salvi, Anton Kaplanyan, [Chris Wyman](/index.php/person/chris-wyman), Nir Benty, [Aaron Lefohn](/index.php/person/aaron-lefohn), [David Luebke](/index.php/person/david-luebke) [SIGGRAPH Emerging Technologies](http://s2016.siggraph.org/content/emerging-technologies) [Exploring and Expanding the Continuum of OIT Algorithms](/publication/2016-06_exploring-and-expanding-continuum-oit-algorithms) [Chris Wyman](/person/chris-wyman) [High Performance Graphics 2016](http://dl.acm.org/citation.cfm?id=2977338) ### 2015 [CloudLight: A System for Amortizing Indirect Lighting in Real-Time Rendering](/index.php/publication/2015-10_cloudlight-system-amortizing-indirect-lighting-real-time-rendering) [Cyril Crassin](/index.php/person/cyril-crassin), [David Luebke](/index.php/person/david-luebke), Michael Mara, Morgan McGuire, Brent Oster, Peter Shirley, Peter-Pike Sloan, [Chris Wyman](/index.php/person/chris-wyman) [Journal of Computer Graphics Techniques](http://jcgt.org/published/0004/04/01/) [Decoupled Coverage Anti-Aliasing](/publication/2015-08_decoupled-coverage-anti-aliasing) Yuxiang Wang, [Chris Wyman](/person/chris-wyman), Yong He, Pradeep Sen [ACM / EG Symposium on High Performance Graphics](http://www.highperformancegraphics.org/2015/) [Frustum-Traced Raster Shadows: Revisiting Irregular Z-Buffers](/publication/2015-02_frustum-traced-raster-shadows-revisiting-irregular-z-buffers) [Chris Wyman](/person/chris-wyman), Rama Hoetzlein, [Aaron Lefohn](/person/aaron-lefohn) [Symposium on Interactive 3D Graphics and Games](http://dl.acm.org/event.cfm?id=RE299) ### 2013 [Imperfect Voxelized Shadow Volumes](/publication/2013-07_imperfect-voxelized-shadow-volumes) [Chris Wyman](/person/chris-wyman), Zeng Dai [High Performance Graphics](http://highperformancegraphics.org/) [CloudLight: A system for amortizing indirect lighting in real-time rendering (Technical Report)](/publication/2013-07_cloudlight-system-amortizing-indirect-lighting-real-time-rendering-technical) [Cyril Crassin](/person/cyril-crassin), [David Luebke](/person/david-luebke), Michael Mara, Morgan McGuire, Brent Oster, Peter Shirley, Peter-Pike Sloan, [Chris Wyman](/person/chris-wyman) [Simple Analytic Approximations to the CIE XYZ Color Matching Functions](/index.php/publication/2013-07_simple-analytic-approximations-cie-xyz-color-matching-functions) [Chris Wyman](/index.php/person/chris-wyman), Peter-Pike Sloan, Peter Shirley [Journal of Computer Graphics Techniques](http://jcgt.org/)