2025/06/12 by Daniel Meister, Meister, Daniel, Jakub Bokšanský +5 · 1 citation
Computer Science · Engineering · #Advanced Image Fusion Techniques #Computer Graphics and Visualization Techniques #FOS: Computer and information sciences #Graphics (cs.GR) #Image Enhancement Techniques
paper · doi:10.48550/arxiv.2506.11273
openalex publication_date 2025/06/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 (1.3-2.0x), but to recover the reordering overhead in the hardware-accelerated trace phase is problematic.