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    Vectorized Production Path Tracing

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    Date
    2017
    Author
    Lee, Mark
    Green, Brian
    Xie, Feng
    Tabellion, Eric
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    Abstract
    This paper presents MoonRay, a high performance production rendering architecture using Monte Carlo path tracing developed at DreamWorks Animation. MoonRay is the first production path tracer, to our knowledge, designed to fully leverage Single Instruction/ Multiple Data (SIMD) vector units throughout. To achieve high SIMD efficiency, we employ Embree for tracing rays and vectorize the remaining compute intensive components of the renderer: the integrator, the shading system and shaders, and the texturing engine. Queuing is used to help keep all vector lanes full and improve data coherency.We use the ISPC programming language [Intel 2011; Pharr and Mark 2012] to achieve improved performance across SSE, AVX/AVX2 and AVX512 instruction sets. Our system includes two functionally equivalent uni-directional CPU path tracing implementations: a C++ scalar depth-first version and an ISPC vectorized breadth-first wavefront version. Using side by side performance comparisons on complex production scenes and assets we show our vectorized architecture, running on AVX2, delivers between a 1.3× to 2.3× speed-up in overall render time, and up to 3×, 6×, and 4×, speed-ups within the integration, shading, and texturing components, respectively.
    BibTeX
    @inproceedings {10.1145:3105762.3105768,
    booktitle = {Eurographics/ ACM SIGGRAPH Symposium on High Performance Graphics},
    editor = {Vlastimil Havran and Karthik Vaiyanathan},
    title = {{Vectorized Production Path Tracing}},
    author = {Lee, Mark and Green, Brian and Xie, Feng and Tabellion, Eric},
    year = {2017},
    publisher = {ACM},
    ISSN = {2079-8679},
    ISBN = {978-1-4503-5101-0},
    DOI = {10.1145/3105762.3105768}
    }
    URI
    http://dx.doi.org/10.1145/3105762.3105768
    https://diglib.eg.org:443/handle/10.1145/3105762-3105768
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    Eurographics Association copyright © 2013 - 2023 
    Send Feedback | Contact - Imprint | Data Privacy Policy | Disable Google Analytics
    Theme by @mire NV
    System hosted at  Graz University of Technology.
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