Real-Time Importance Deep Shadows Maps with Hardware Ray Tracing

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dc.contributor.authorKern, Renéen_US
dc.contributor.authorBrüll, Felixen_US
dc.contributor.authorGrosch, Thorstenen_US
dc.contributor.editorWang, Beibeien_US
dc.contributor.editorWilkie, Alexanderen_US
dc.date.accessioned2025-06-20T07:55:22Z
dc.date.available2025-06-20T07:55:22Z
dc.date.issued2025
dc.description.abstractRendering shadows for semi-transparent objects like smoke significantly enhances the realism of the final image. With advancements in ray tracing hardware, tracing visibility rays in real time has become possible. However, generating shadows for semi-transparent objects requires evaluating multiple or all intersections along the ray, resulting in a deep shadow ray. Deep Shadow Maps (DSM) offer an alternative but are constrained by their fixed resolution. We introduce Importance Deep Shadow Maps (IDSM), a real-time algorithm that adaptively distributes Deep Shadow samples based on importance captured from the current camera viewport. Additionally, we propose a novel DSM data structure built on the ray tracing acceleration structure, improving performance for scenarios requiring many samples per DSM texel. Our IDSM approach achieves speedups of up to ×6.89 compared to hardware ray tracing while maintaining a nearly indistinguishable quality level.en_US
dc.description.number4
dc.description.sectionheadersLight and Brightness
dc.description.seriesinformationComputer Graphics Forum
dc.description.volume44
dc.identifier.doi10.1111/cgf.70178
dc.identifier.issn1467-8659
dc.identifier.pages12 pages
dc.identifier.urihttps://doi.org/10.1111/cgf.70178
dc.identifier.urihttps://diglib.eg.org/handle/10.1111/cgf70178
dc.publisherThe Eurographics Association and John Wiley & Sons Ltd.en_US
dc.rightsAttribution 4.0 International License
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectCCS Concepts: Computing methodologies → Visibility; Ray tracing
dc.subjectComputing methodologies → Visibility
dc.subjectRay tracing
dc.titleReal-Time Importance Deep Shadows Maps with Hardware Ray Tracingen_US
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