Multi Bounding Volume Hierarchies for Ray Tracing Pipelines

Viitanen, Timo; Koskela, Matias; Jääskeläinen, Pekka; Takala, Jarmo (2016)
 
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Viitanen, Timo
Koskela, Matias
Jääskeläinen, Pekka
Takala, Jarmo
2016

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doi:10.1145/3005358.3005384
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https://urn.fi/URN:NBN:fi:tty-201612164871

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Non peer reviewed
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High-performance ray tracing on CPU is now largely based on Multi Bounding Volume Hierarchy (MBVH) trees. We apply MBVH to a fixed-function ray tracing accelerator architecture. According to cycle-level simulations and power analysis, MBVH reduces energy per frame by an average of 24% and improves performance per area by 19% in scenes with incoherent rays, due to its compact memory layout which reduces DRAM traffic. With primary rays, energy efficiency improves by 15% and performance per area by 20%.
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