Real-time path tracing

These are the first experiments with a new real-time path tracing engine I have been working on. It runs inside TouchDesigner and renders ordinary TouchDesigner scenes with physically based global illumination, glass, caustics and emissive light at interactive frame rates.

How it works

A GLSL POP, with one point per pixel, traces full light paths on the GPU using hardware ray queries. Each path bounces up to eight times through GGX metals, dielectric glass with dispersion and thin-film surfaces, sampling lights, emitters and the environment at every bounce. Every frame is a fresh noisy estimate, cleaned up live by NVIDIA DLSS Ray Reconstruction through a custom TouchDesigner plugin.