Unity-DLSS

Unity-DLSS is a Unity native plugin with NVIDIA DLSS Super Resolution, Ray Reconstruction, and optional DLSS 5 Neural Rendering support.

DLSS Integration

This project integrates NVIDIA DLSS SDK without including the full repository in the source code to avoid open-source licensing risks.

Setup DLSS SDK

Before building, you need to fetch the DLSS headers and DLLs:

.\fetch_dlss.ps1

This script will:

• Download the DLSS SDK from GitHub (https://github.com/NVIDIA/DLSS)
• Extract header files from include/ to External/NVIDIA-DLSS/include
• Extract DLL files from lib/Windows_x86_64/rel/ to External/NVIDIA-DLSS/lib

Build

After fetching DLSS, configure and build with CMake:

mkdir build
cd build
cmake ..
cmake --build .

DLSS 5 Neural Rendering is delivered as a separate NVIDIA-signed nvngx_dlssnr.dll and is not downloaded by fetch_dlss.ps1. Configure its path when it is available:

cmake -S . -B build -DDLSSNR_DLL:FILEPATH="D:/path/to/nvngx_dlssnr.dll"
cmake --build build --config Release

The build copies the file next to UnityDLSS.dll. Without this option the plugin still builds, and DLSS-SR/RR remain available; the managed IsNRSupported property reports false.

The CMake configuration will automatically:

• Include DLSS header files in the build
• Copy DLSS DLLs to the output directory alongside your plugin DLL

Project Structure

├── External/
│   └── NVIDIA-DLSS/          # DLSS SDK (fetched by script)
│       ├── include/          # DLSS header files
│       └── lib/              # DLSS DLL files
├── PluginAPI/                # Unity plugin API headers
├── src/                      # Plugin source code
├── CMakeLists.txt            # CMake configuration
└── fetch_dlss.ps1           # Script to fetch DLSS SDK

Notes

• The DLSS SDK is fetched at build time, not stored in the repository
• Only the necessary files (headers and DLLs) are extracted
• The script supports both git sparse checkout and zip download methods
• nvngx_dlssnr.dll is not committed or redistributed by this repository
• DLSS 5 Neural Rendering uses D3D12 NGX feature 18 and is independent of DLSS Ray Reconstruction (feature 13)