# NVIDIA-RTX/RTXPT

Real-time path tracing library and sample

Repository: https://github.com/NVIDIA-RTX/RTXPT
Canonical: https://ross.abutalabs.com/products/rtxpt
Language: C++
License: NOASSERTION
License Family: other
Last push: 2026-03-19T15:26:27+00:00

## Health v2 (maintenance only)
Score: 68/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 73, release rhythm 49, longevity 90
- inputs: {"age_days": 1269, "days_push": 167, "days_rel": 181, "gap_med": 102.0, "n_releases_24m": 5}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1010, forks 108 (observed 2026-08-28T04:03:13.061093+00:00)

## What it is
NVIDIA's real-time path tracing library and sample application, a pure path tracer built on the Donut framework with DirectX 12 and Vulkan backends. It serves as a reference implementation for integrating real-time ray-traced light transport with techniques like NEE-AT guided importance sampling and DLSS-RR denoising.

## Use cases
- integrate real-time path tracing into a game engine
- learn how to build a real-time path tracer
- reference implementation for DXR and Vulkan ray tracing
- experiment with neural denoising like DLSS-RR
- benchmark GPU path tracing performance
- study importance sampling and light transport techniques

## When to choose
- you need a production-quality reference path tracer for DirectX 12 or Vulkan
- you want to learn modern real-time ray tracing techniques from NVIDIA
- you're building a renderer and want a clean starting point for path tracing integration

## When to avoid
- you need a rasterization-based renderer
- you target hardware without DXR/Vulkan ray tracing support
- you need a full game engine rather than a rendering sample

## Facets
- artifact type: library
- maturity: active
- function: graphics, simulation, game-engine, sdk
- domain: graphics, simulation
- platform: windows, cpp, cross-platform
- tags: path-tracing, ray-tracing, directx-12, vulkan, nvidia-rtx, dlss, hlsl, real-time-rendering, denoising, sample-code, game-development, linux, gpu

## Member repositories
- NVIDIA-RTX/RTXPT (main) score 68

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:13.061093+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:11:54.876112+00:00, confidence not recorded.
  - readme: https://github.com/NVIDIA-RTX/RTXPT (fetched 2026-08-28T04:03:13.061093+00:00, sha 8bc42c6c8304)
- Data as of 2026-08-30T08:39:29.467469+00:00.