Interactive exploration of simulation results on large, unstructured, tetrahedral meshes typically requires significant hardware resources such as a visualization cluster. NVIDIA RTX™ is a technology that was originally designed to accelerate ray tracing in games. By leveraging RTX technology, we have successfully accelerated direct volume rendering of tetrahedral meshes, achieving interactive rates on consumer-level hardware. In the video, a mesh with 12.3 million tetrahedra is rendered in less than 100ms per frame (more than 10 frames per second) on an NVIDIA GeForce RTX™ 2080 Ti. Besides the use of the newest hardware extensions, Fraunhofer IGD also explores novel GPU data structures to accelerate direct volume rendering of other volumetric meshes and on GPUs without hardware ray tracing.
We thank the University of Utah for providing the dataset used in the video.