Communications of the ACM
Spatial splits in bounding volume hierarchies
Proceedings of the Conference on High Performance Graphics 2009
Micropolygon ray tracing with defocus and motion blur
ACM SIGGRAPH 2010 papers
OptiX: a general purpose ray tracing engine
ACM SIGGRAPH 2010 papers
Two-level ray tracing with reordering for highly complex scenes
Proceedings of Graphics Interface 2010
Physically Based Rendering, Second Edition: From Theory To Implementation
Physically Based Rendering, Second Edition: From Theory To Implementation
Efficient bounding of displaced Bézier patches
Proceedings of the Conference on High Performance Graphics
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When a bounding volume hierarchy is used for accelerating the intersection of rays and scene geometry, one common way to incorporate motion blur is to interpolate node bounding volumes according to the time of the ray. However, such hierarchies typically exhibit large overlap between bounding volumes, which results in an inefficient traversal. This work builds upon the concept of spatially partitioning nodes during tree construction in order to reduce overlap in the presence of moving objects. The resulting hierarchies are often significantly cheaper to traverse than those generated by classic approaches.