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On Ray Reordering Techniques for Faster GPU Ray Tracing

Title data

Meister, Daniel ; Boksansky, Jakub ; Guthe, Michael ; Bittner, Jiří:
On Ray Reordering Techniques for Faster GPU Ray Tracing.
In: Symposium on Interactive 3D Graphics and Games : Proceeding. - New York, NY, USA : Association for Computing Machinery , 2020 . - 13
ISBN 978-1-4503-7589-4
DOI: https://doi.org/10.1145/3384382.3384534

Official URL: Volltext

Abstract in another language

We study ray reordering as a tool for increasing the performance of existing GPU ray tracing implementations. We focus on ray reordering that is fully agnostic to the particular trace kernel. We summarize the existing methods for computing the ray sorting keys and discuss their properties. We propose a novel modification of a previously proposed method using the termination point estimation that is well-suited to tracing secondary rays. We evaluate the ray reordering techniques in the context of the wavefront path tracing using the RTX trace kernels. We show that ray reordering yields significantly higher trace speed on recent GPUs (1.3 − 2.0 ×), but to recover the reordering overhead in the hardware-accelerated trace phase is problematic.

Further data

Item Type: Article in a book
Refereed: Yes
Keywords: real-time rendering; ray tracing; ray sorting; RTX
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Computer Science > Professor Applied Computer Science V > Professor Applied Computer Science V - Univ.-Prof. Dr. Michael Guthe
Result of work at the UBT: Yes
DDC Subjects: 000 Computer Science, information, general works > 004 Computer science
Date Deposited: 07 May 2024 11:03
Last Modified: 07 May 2024 11:03
URI: https://eref.uni-bayreuth.de/id/eprint/89503