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Robust BVH Ray Traversal - FMA correction Thiago Ize. This short unpublished paper explains why there is a mistake in the original Robust BVH Traversal paper, and then gives two proofs for why fused multiply-add (FMA) optimized ray-bounding box intersection should not be used. Instead of having only 2 ulps of error, the FMA method can actually have extremely large amounts of error. The non-FMA intersection method, as used in the rest of the original paper, and for which the measurements in the paper are based on, is still correct at only 2 ulps of error. A revised version of the main paper has been republished at JCGT. [draft of explanatory pdf] |
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Robust BVH Ray Traversal Thiago Ize. Journal of Computer Graphics Techniques, Vol 2, No. 2, 2013. The original Robust BVH paper had a mistake in the numerical error derivation for the fused multiply-add (FMA) optimized ray-bounding box intersection. Instead of having only 2 ulps of error, this method can actually have extremely large amounts of error. The non-FMA intersection method, as used in the rest of the paper, and for which the measurements in the paper are based on, is still correct at only 2 ulps of error. [revised pdf] |
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Image-parallel Ray Tracing using OpenGL Interception Carson Brownlee, Thiago Ize, Charles D. Hansen. 2013 Eurographics Symposium on Parallel Graphics and Visualization. [pdf] |
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"Rendering", High Performance Visualization: Enabling Extreme-Scale Scientific Insight Charles Hansen, Wes Bethel, Thiago Ize, Carson Brownlee. Chapman & Hall/CRC Computational Science, 2012, pp. 51-72. [Book] |
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Fast, Effective BVH Updates for Animated Scenes Daniel Kopta, Thiago Ize, Josef Spjut, Erik Brunvand, Al Davis, Andrew Kensler. I3D 2012. [pdf] [source code] |
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2-gigapixel high quality rendering of the gigapolygon David note: artifacts exist in supplied model [Details and link to interactive streaming viewer] |
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Real-Time Ray Tracer for Visualizing Massive Models on a Cluster Thiago Ize, Carson Brownlee, Charles D. Hansen. 2011 Eurographics Symposium on Parallel Graphics and Visualization. [pdf] |
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RTSAH traversal order for occlusion rays Thiago Ize, Charles D. Hansen. Eurographics 2011. [pdf] [source code] |
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State of the art in ray tracing animated scenes Ingo Wald, William R Mark, Johannes Günther, Solomon Boulos, Thiago Ize, Warren Hunt, Steven G. Parker, Peter Shirley. Computer Graphics Forum, 2009. [Link to paper] |
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Efficient Acceleration Structures for Ray Tracing Static and
Dynamic Scenes Thiago Ize PhD dissertation, University of Utah, 2009. [pdf] |
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Ray tracing with the BSP tree Thiago Ize, Ingo Wald, Steven G. Parker. 2008 IEEE Symposium on Interactive Ray Tracing. [pdf] [slides - pdf] [slides - mov] [source code] |
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Fast, parallel, and asynchronous construction of BVHs for ray
tracing animated scenes Ingo Wald, Thiago Ize, Steven G. Parker. Computers & Graphics, 32(1), February 2008, 3-13. [pdf] |
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Grid creation strategies for efficient ray tracing Thiago Ize, Peter Shirley, Steven G. Parker. 2007 IEEE/EG Symposium on Interactive Ray Tracing. My dissertation includes additional information for how many grid levels should be used for a given scene. [pdf] [slides - pdf] [source code] |
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State of the art in ray tracing animated scenes Ingo Wald, William R Mark, Johannes Günther, Solomon Boulos, Thiago Ize, Warren Hunt, Steven G. Parker, Peter Shirley. Eurographics 2007 State of the Art Reports. [high quality pdf] [low quality pdf] |
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Asynchronous BVH construction for ray tracing dynamic scenes on parallel
multi-core architectures Thiago Ize, Ingo Wald, Steven G. Parker. 2007 Eurographics Symposium on Parallel Graphics and Visualization. [pdf] [Video, 17MB] |
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A coherent grid traversal approach to visualizing particle-based simulation data Christiaan P. Gribble, Thiago Ize, Andrew Kensler, Ingo Wald, Steven G. Parker. IEEE Transactions on Visualization and Computer Graphics, July/August 2007. [pdf] |
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Summary of some of my work from 2006 Thiago Ize The Utah Teapot, Fall 2006, page 5. [pdf] |
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An evaluation of parallel grid construction for ray tracing dynamic scenes Thiago Ize, Chelsea Robertson, Ingo Wald, Steven G. Parker. 2006 IEEE Symposium on Interactive Ray Tracing. [pdf] [source code] [slides - pdf] |
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Ray tracing animated scenes using coherent grid traversal Ingo Wald, Thiago Ize, Andrew Kensler, Aaron Knoll, Steven G. Parker. ACM SIGGRAPH 2006, 485-493. [pdf] [Video, 35MB] |
Realistic Image
Synthesis course (Summer 2005)
Ray Tracing course (Spring 2005)
Rendering Fur project (Fall 2004)