Path tracer — rtxpt backend
Photon RTXPT
Real-time path tracing inside TouchDesigner.
Photon RTXPT brings NVIDIA's rtxpt path tracer into TouchDesigner as a native C++/CUDA operator family — a renderer TOP with companion Light and Material operators, driven entirely from the network.

Capabilities
Native operator
A compiled C++/CUDA plugin, not a Python wrapper — the renderer runs in-process and frames land as TOPs.
Light + Material operators
Lights and materials are first-class operators, so scene setup stays procedural and network-driven.
RTX-accelerated
Hardware ray tracing with DLSS-class reconstruction on RTX-series GPUs.
Specifications
- Host
- TouchDesigner (Windows)
- Backend
- NVIDIA rtxpt
- Plugin
- PhotonRtxpt.dll — TOP + Light/Material
- License
- 1 activation per key, managed in Polar
Requirements
- Windows 10/11 x64
- NVIDIA RTX-series GPU
- Recent NVIDIA Studio or Game Ready driver