DX12 DLSS Frame Generation Injector

A DLL-based injector that enables NVIDIA DLSS Frame Generation (via Streamline) in compatible games that do not natively support it.

Current Status

• Tested on Scarlet Nexus and Code Vein and Captain Tsubasa: World Fighters
• All three games use Unreal Engine + DirectX 12
• Frame Generation works
• Some stuttering can occur in very busy scenes (expected behavior with frame generation)
• No major ghosting observed during normal gameplay in the tested scenarios
• Full source code available

Important: Compatibility with other games is currently a hypothesis and has not been confirmed beyond the three tested titles.

How it works (high level)

The injector acts as a winmm.dll proxy.
It initializes NVIDIA Streamline early, hooks the necessary DirectX 12 / DXGI calls, and supplies the required camera matrices, depth, and motion vectors so that DLSS Frame Generation can run.

It includes automatic detection of different UE4 view-buffer layouts to improve compatibility across engine versions.

Tested Games

Newly Added / Experimental Games

These games were tested after the core development phase. The code was not built or tuned around them: they run on the same generic camera/view-buffer detection used for the three main titles. Results may vary, so please attach SN_DLSSG_log.txt and sl.log when reporting problems.

Installation

1. Files you need

Get the Streamline files from NVIDIA's official repository (https://github.com/NVIDIAGameWorks/Streamline). Use the production (not development) DLLs from the SDK's bin/x64 folder. Use the same SDK version for all files. The versions I tested with: 2.14.1.

These files are NOT included in this repository or in the releases.

2. Folder layout

Put everything in the same folder as the game's executable (the .exe inside ...\Binaries\Win64\ for Unreal Engine games):

Binaries\Win64\
├── ScarletNexus-Win64-Shipping.exe     (the game's own exe)
├── winmm.dll
├── sl.interposer.dll
├── sl.common.dll
├── sl.dlss_g.dll
├── sl.reflex.dll
├── sl.pcl.dll
├── nvngx_dlssg.dll
└── SN_DLSSG_cfg.txt

3. Run

1. Launch the game in DirectX 12 mode.
2. To uninstall, delete the files you added.

Troubleshooting

• Game crashes at startup: check that all Streamline DLLs come from the same SDK version, and that the game is running in DX12.
• Please attach the log when opening an issue.

Detailed usage instructions, Streamline file requirements, and config options will be expanded as more testing is completed.

Building

# On Linux (requires git + mingw-w64)
sudo apt install g++-mingw-w64-x86-64-posix git
cd src
sh build.sh

This produces winmm.dll. Dependencies (MinHook + Streamline headers) are fetched automatically at build time.

Dependencies (MinHook + Streamline headers) are fetched automatically at build time. Known Limitations

Currently only confirmed on UE4 & 5 DX12 titles. Stuttering can appear in very dense scenes (common with frame generation). Broader compatibility is untested. Requires official NVIDIA Streamline / DLSS-G runtime files (these are not redistributed with this project).

Technical Notes

No NVIDIA proprietary binaries are redistributed. Streamline headers and MinHook are fetched at build time. See THIRD_PARTY_NOTICES.md for details.

Development

This project was written entirely by an AI model (Claude Sonnet 5.5, by Anthropic). I directed the work, tested it on real games, and verified the results myself. I did not write the code by hand.

Disclaimer This project is not affiliated with, endorsed by, or connected to NVIDIA Corporation.

NVIDIA, DLSS, Streamline, and RTX are trademarks of NVIDIA Corporation.

Use at your own risk. Always back up your game files.