DIRT: Deferred Image-based Ray Tracing

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dc.contributor.author Vardis, Konstantinos en_US
dc.contributor.author Vasilakis, Andreas-Alexandros en_US
dc.contributor.author Papaioannou, Georgios en_US
dc.contributor.editor Ulf Assarsson and Warren Hunt en_US
dc.date.accessioned 2016-06-17T14:07:15Z
dc.date.available 2016-06-17T14:07:15Z
dc.date.issued 2016 en_US
dc.identifier.isbn 978-3-03868-008-6 en_US
dc.identifier.issn 2079-8679 en_US
dc.identifier.uri http://dx.doi.org/10.2312/hpg.20161193 en_US
dc.description.abstract We introduce a novel approach to image-space ray tracing ideally suited for the photorealistic synthesis of fully dynamic environments at interactive frame rates. Our method, designed entirely on the rasterization pipeline, alters the acceleration data structure construction from a per-fragment to a per-primitive basis in order to simultaneously support three important, generally conflicting in prior art, objectives: fast construction times, analytic intersection tests and reduced memory requirements. In every frame, our algorithm operates in two stages: A compact representation of the scene geometry is built based on primitive linked-lists, followed by a traversal step that decouples the ray-primitive intersection tests from the illumination calculations; a process inspired by deferred rendering and the path integral formulation of light transport. Efficient empty space skipping is achieved by exploiting several culling optimizations both in xy- and z-space, such as pixel frustum clipping, depth subdivision and lossless buffer down-scaling. An extensive experimental study is finally offered showing that our method advances the area of image-based ray tracing under the constraints posed by arbitrarily complex and animated scenarios. en_US
dc.publisher The Eurographics Association en_US
dc.subject I.3.3 [Computer Graphics] en_US
dc.subject Methodology and Techniques en_US
dc.subject Graphics data structures and data types en_US
dc.subject I.3.3 [Computer Graphics] en_US
dc.subject Three Dimensional Graphics and Realism en_US
dc.subject Raytracing en_US
dc.title DIRT: Deferred Image-based Ray Tracing en_US
dc.description.seriesinformation Eurographics/ ACM SIGGRAPH Symposium on High Performance Graphics en_US
dc.description.sectionheaders Fast GI en_US
dc.identifier.doi 10.2312/hpg.20161193 en_US
dc.identifier.pages 63-73 en_US


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