Real-Time Path Tracing and Beyond


Real-time graphics is on the cusp of a historic transition to path tracing. With recent advances in hardware ray tracing, systems research, stochastic light sampling, and denoising, we show that complex light transport effects can be path traced in real time on scenes with billions of triangles and millions of emitters. This includes the well-known PBRT research scenes. These results can fundamentally transform real-time graphics research. The talk is divided into two parts. First, we show visual results and discuss how we built the research path tracer. Second, we discuss the research questions that come next for our field, building on the foundation of real-time path tracing. We focus on what will be required to reach our dream of photorealistic rendering of truly lifelike content in real time.

Keynote, High Performance Graphics, 2022