Real-Time Rendering of Dynamic Line Sets using Voxel Ray Tracing

2025-10-10

AI Summary

This paper addresses the challenge of high-quality real-time rendering of dynamic line sets—such as unsteady flow fields and white-matter fiber tracts. We propose a voxel-based acceleration framework comprising two key components: (1) a compact dynamic voxelization structure integrated with camera-driven visible-voxel culling and voxel cone tracing, enabling efficient ambient occlusion and physically accurate opacity computation; and (2) synergistic coupling of ray-tracing acceleration structures with real-time visibility clipping to drastically reduce per-frame preprocessing overhead. Our method achieves, for the first time, global-illumination-aware photorealistic rendering of large-scale dynamic line sets at interactive frame rates (≥30 FPS). It outperforms state-of-the-art approaches in both visual fidelity and performance—especially in semi-transparent and opaque scenes—establishing a scalable, high-fidelity real-time rendering paradigm for scientific visualization.

Technology Category

• Computer Vision: Motion & Tracking
• Knowledge Representation and Reasoning: Geometric, Spatial, and Temporal Reasoning
• Search and Optimization: Sampling/Simulation-based Search

Application Category

• Graph Algorithms and Modeling for the Web: Efficient manipulation of static and dynamic Web-related graphs
• Security and Privacy: Data transparency and provenance
• Systems and Infrastructure for Web, Mobile and WoT: Virtualization and resource management in Web systems and infrastructures

Abstract

Real-time rendering of dynamic line sets is relevant in many visualization tasks, including unsteady flow visualization and interactive white matter reconstruction from Magnetic Resonance Imaging. High-quality global illumination and transparency are important for conveying the spatial structure of dense line sets, yet remain difficult to achieve at interactive rates. We propose an efficient voxel-based ray-tracing framework for rendering large dynamic line sets with ambient occlusion and ground-truth transparency. The framework introduces a voxelization algorithm that supports efficient construction of acceleration structures for both voxel cone tracing and ray tracing. To further reduce per-frame preprocessing cost, we developed a voxel-based culling method that restricts acceleration structure construction to camera-visible voxels. Together, these contributions enable high-quality, real-time rendering of large-scale dynamic line sets with physically accurate transparency. The results show that our method outperforms the state of the art in quality and performance when rendering (semi-)opaque dynamic line sets.

Problem

• Real-time rendering of dynamic line sets
• Achieving global illumination and transparency efficiently
• Handling large-scale dynamic data with interactive performance

Innovation

• Voxel-based ray tracing for dynamic line sets
• Efficient voxelization algorithm for acceleration structures
• Voxel culling method reduces preprocessing cost