Tauray: A Scalable Real-Time Open-Source Path Tracer for Stereo and Light Field Displays

Abstract

Figure 1: A simple scene including the "Stanford Bunny", rendered with Tauray in real-time on an RTX 3090, shown from two different angles on the Looking Glass Portrait light field display. Left pair: denoised path tracing at ~50 ms per frame. Right pair: DDISH-GI [Ikkala et al. 2021] at ~15 ms per frame.

Real-time Stereoscopic Image-parallel Path Tracing

“…[17] reported on a 10× Quadro RTX 8000 GPUs node, for a single view at 30 spp and 10 bounces and a resolution of 1280 × 720, for a scene containing 964k triangles, a rendering frequency of ∼ 3 Hz. With a scene of approximately 1M triangles (Bistro exterior) and two views, each at 1280×720 resolution, our pipeline runs at ∼ 1.85 Hz to render two views, leading to roughly ∼ 3.7 Hz to render a single view on our 4 GPUs setup with 30 spp and 10 bounces which shows that our pipeline is competitive against other image-parallel pipelines [4,17], especially for stereo path tracing.…”

“…Path tracing is also used in Tauray, a state-of-the-art opensource path tracer optimized for stereo and multi-view rendering proposed by Ikkala et al [4]. In Tauray, the distribution of path traced pixels increases the GPU utilization and the balance between GPUs, but the pipeline stages after path tracing, such as denoising, are done only on the primary (or master) GPU.…”

“…We implemented our pipeline inside Tauray [4] (from the git commit hash 4cdf4c4765e97a983ca4fe804f9a80ff5df86c76).…”