The NVIDIA RTX™ Path Tracing Software Development Kit (SDK) merges years of best practices within real-time ray tracing and neural graphics development for building a real-time path tracer.

Real-time path tracing of a scene called “Transparent Machines”
Real-time path tracing of a scene called “Transparent Machines,” created by artist Mike Winkelman. Rendering this glass machine requires light to bounce more than 60 times per light path.

Explore the benefits of the RTX Path Tracing SDK.

Ground truth lighting in real time.

Whether you’re rasterizing, tracing rays, or both, this SDK provides the tools and sample code to build an interactive physically-accurate reference renderer to aid in your development, ensuring your lighting during production is true to life.

Highly customizable toolkit.

This SDK gives you the flexibility to take individual components that suit your needs or take the entire path tracer and integrate it directly into your game engine.

Ultra-realism mode for your game.

This path tracer leverages new hardware in NVIDIA GeForce RTX® 40 Series GPUs, allowing you to provide the highest-quality rendering modes with uncompromised performance.

See path tracing in games.

Cyberpunk 2077

Portal with RTX


Take a deeper dive into RTX Path Tracing core technologies.


NVIDIA DLSS (Deep Learning Super Sampling) is a neural graphics technology that multiplies performance using AI to create entirely new frames and display higher resolution through image reconstruction—all while delivering best-in-class image quality and responsiveness.

Get Started with DLSS
RTXGI in museum scene
NVIDIA Shader Execution Reordering animation

Shader Execution Reordering (SER)

NVIDIA Shader Execution Reordering is an API extension that optimizes execution of ray-traced workloads to achieve maximum parallelism and performance from ray traced shaders.

Download NVAPI (SER will be made available through NVAPI soon)

RTX Direct Illumination (RTXDI)

NVIDIA RTXDI is a ray-tracing algorithm that renders millions of dynamic lights and shadows in a scene without performance hits. RTXDI is accelerated by RT Cores in RTX GPUs.

Get Started with RTXDI
RTXGI in museum scene
Light propes in RTXGI

Real-Time Denoisers

NVIDIA Real-Time Denoisers (NRD) is a cross-platform denoising library for ray-traced lighting, shadows, and ambient occlusion. It provides fast and uncompromised image quality for when you have a limited budget of rays per pixel.

Get Started with NRD

Stay up to date on NVIDIA rendering news.

New Release: NVIDIA RTX Global Illumination 1.3

New Release: NVIDIA RTX Global Illumination 1.3

NVIDIA RTX Global Illumination (RTXGI) 1.3 includes highly requested features such as dynamic library support, an increased maximum probe count per DDGI volume by 2x, support for Shader Model 6.6 Dynamic Resources in D3D12, and more.

Explainer: What Is the Metaverse

Explainer: What Is the Metaverse

The metaverse is the “next evolution of the internet, the 3D internet,” according to NVIDIA CEO Jensen Huang.

Open Source Simulation Expands with NVIDIA PhysX 5 Release

Open Source Simulation Expands with NVIDIA PhysX 5 Release

Learn about the latest version of the NVIDIA PhysX SDK, the primary physics engine of NVIDIA Omniverse.

Accelerating Load Times for DirectX Games and Apps with GDeflate for DirectStorage

Accelerating Load Times for DirectX Games and Apps with GDeflate for DirectStorage

Load times. They are the bane of any developer trying to construct a seamless experience. Trying to hide loading in a game by forcing a player to shimmy through narrow passages or take extremely slow elevators breaks immersion. Now, developers have a better solution. NVIDIA collaborated with Microsoft and IHV partners to develop GDeflate for DirectStorage … Continued

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