OptiScaler is middleware that enables various upscaling technologies in DLSS2-only games. It allows non-Nvidia users to use upscaling by applying DLSS2 inputs to XeSS, FSR2, or FSR3. It also offers extensive customization options for all users, including those with Nvidia GPUs using DLSS.

Key aspects of OptiScaler:

• Enables XeSS, FSR2, and FSR3 in DLSS2-only games
• Provides tuning options for DLSS users
• Offers a wide range of tweaks and enhancements (RCAS & MAS, Output Scaling, DLSS Presets, Ratio & DRS Overrides etc.)
• Allows users to fine-tune their upscaling experience
• With version 0.7.0 and above experimental frame generation support

Official Discord Server: DLSS2FSR

This project is based on PotatoOfDoom's excellent CyberFSR2.

Installation

Warning: Do not use this mod with online games. It may trigger anti-cheat software and cause bans!

Install as non-nvngx (For enabling all features like Frame Gen)

To overcome DLSS 3.7's signature check requirements, I implemented a method developed by Artur (creator of DLSS Enabler). Later, this method increased the compatibility of OverlayMenu, allowed OptiScaler to spoof DXGI and Vulkan, let users override the nvapi64.dll and even let users to force Anitsotropic Filtering and Mipmap Lod Bias. In short, this installation method allowed OptiScaler to provide more features to users.

Step-by-step installation (Nvidia users please skip to step 3):

1. We need an Nvidia signed dll file to bypass signature checks. All games that support DLSS come with nvngx_dlss.dll. Most of the time it's in the games exe folder (e.g. for Unreal Engine games it's <path-to-game>\Binaries\Win64\). Some games and engines keep these third party dll's in different folders (like plugins). So we need to find the nvngx_dlss.dll file and copy it to the games exe folder. If it's already in the games exe folder, make a copy of it.
2. Rename the copy of nvngx_dlss.dll in the games exe folder to nvngx.dll.
3. Rename OptiScaler's nvngx.dll to one of the supported filenames (I prefer dxgi.dll) [1].
4. Copy the renamed OptiScaler file to your game's executable folder.
5. If your GPU is not an Nvidia one, check GPU spoofing options.

OptiScaler supports these filenames

• dxgi.dll
• winmm.dll
• version.dll
• wininet.dll
• winhttp.dll
• OptiScaler.asi (with an ASI loader)

[1] Linux users should add renamed dll to overrides:

WINEDLLOVERRIDES=dxgi=n,b %COMMAND% 

If there is another mod (e.g. Reshade etc.) that uses the same filename (e.g. dxgi.dll), if you rename it with the -original suffix (e.g. dxgi-original.dll), OptiScaler will load this file instead of the original library.

Alternatively you can create a new folder called plugins and put other mods files in this folder. OptiScaler will check this folder and if it finds the same dll file (for example dxgi.dll), it will load this file instead of the original library.

Please don't rename the ini file, it should stay as nvngx.ini.

Install as nvngx.dll (Limited features, FG and Overlay Menu will be disabled)

Step-by-step installation:

1. Download the latest relase from releases.
2. Extract the contents of the archive next to the game executable file in your games folder. (e.g. for Unreal Engine games it's <path-to-game>\Binaries\Win64\) [1]
3. Run EnableSignatureOverride.reg from DlssOverrides folder and confirm merge. [2][3]
4. If your GPU is not an Nvidia one, check GPU spoofing options.

[1] This package contains latest version of libxess.dll and if game folder contains any older version of same library it would be overwritten. Consider backing up or renaming existing file.

[2] Normally Streamline and games check if nvngx.dll is signed, by merging this .reg file we are overriding this signature check.

[3] Adding signature override on Linux - There are many possible setups, this one will focus on steam games:

• Make sure you have protontricks installed
• Run in a terminal protontricks regedit, replace with an id for your game
• Press "registry" in the top left of the new window -> Import Registry File -> navigate to and select EnableSignatureOverride.reg
• You should see a message saying that you successfully added the entries to the registry

If your game is not on Steam, it all boils down to opening regedit inside your game's prefix and importing the file.

Update OptiScaler version when using DLSS Enabler

1. Delete/rename dlss-enabler-upscaler.dll in game folder
2. Extract nvngx.dll file from OptiScaler 7zip file to a temp folder
3. Rename nvngx.dll to dlss-enabler-upscaler.dll
4. Copy dlss-enabler-upscaler.dll from temp folder to the game folder

Uninstallation

• Run DisableSignatureOverride.reg file
• Delete EnableSignatureOverride.reg, DisableSignatureOverride.reg, nvngx.dll, nvngx.ini files
• If there were a libxess.dll file and you have backed it up delete the new file and restore the backed up file. If you have overwrote old file DO NOT delete libxess.dll file. If there were no libxess.dll file it's safe to delete.

How it works?

OptiScaler implements the necessary API methods of DLSS2 & NVAPI to act as a middleware. It interprets calls from the game and redirects them to the chosen upscaling backend, allowing games designed for one technology to use another.

Features

• Supports multiple upscaling backends (XeSS, FSR 2.1.2, FSR 2.2.1, FSR 3.1 and DLSS)
• Experimental support for frame generation with version 0.7.0 and above
• Supports DLSS 3.7 and above (check installation instructions)
• Supports DLSS-D (Ray Reconstruction) on Nvidia cards (Supports changing presets and using OptiScaler enchanchements)
• Ability to modify DLSS/DLSS-D presets on the fly
• Supports XeSS v1.3.x's Ultra Performance, NativeAA modes (Not using XeSS 1.3.x scaling ratios)
• An in-game menu for tuning and saving settings on the fly (Shortcut key is INSERT)
• Full integration with DLSS Enabler for DLSS-FG support
• RCAS support with MAS (Motion Adaptive Sharpening) for all Dx12 & Dx11 upscalers
• Output Scaling option (0.5x to 3.0x) for backends running on Dx12 & Dx11
• Supports DXGI spoofing (when running as dxgi.dll) as Nvidia GPUs (with XeSS detection to enable XMX on Intel Arc cards)
• Supports Vulkan spoofing (needs to be enabled from nvngi.ini) as Nvidia GPUs (not working for Doom Eternal)
• Supports loading specific nvapi64.dll file (when running in non-nvngx mode)
• Supports loading specific nvngx_dlss.dll file (when running in non-nvngx mode)
• Supports overriding scaling ratios
• Supports overriding DRS range
• Autofixes for colored lights on Unreal Engine & AMD graphics cards
• Autofixes for missing exposure texture information
• Ability to modify Mipmap Lod Bias value of game

Configuration

Please check this document for configuration parameters and explanations. (Will be updated)

Known Issues

If you can't open in-game menu:

1. Please check that you have enabled DLSS from game options
2. Please try opening menu while you are in-game (while 3D rendering is happening)
3. There is a 200 frame delay before enabling in-game menu, please wait 10-15 seconds before opening menu.
4. If you are using RTSS (MSI Afterburner, CapFrameX) please enable this setting of RTSS and try updating RTSS.

Please check this document for rest of the known issues and possible solutions for them.

Which APIs and Upscalers are Supported?

Currently OptiScaler can be used with DirectX 11, DirectX 12 and Vulkan but each API has different sets of upscaler options.

For DirectX 12

• XeSS 1.x.x (Default)
• FSR2 2.1.2, 2.2.1
• FSR3 3.1.0 & FSR2 2.3.2
• DLSS

For DirectX 11

• FSR2 2.2.1 (Default, native DX11)
• FSR3 3.1.1 (unofficial port to native DX11)
• XeSS 1.x.x, FSR2 2.1.2, 2.2.1, FSR3 3.1.0 & FSR2 2.3.2 (via background DX12 processing) [*]
• DLSS (native DX11)

[*] This implementations uses a background DirectX12 device to be able to use Dirext12 only upscalers. There is %10-15 performance penalty for this method but allows much more upscaler options. Also native DirectX11 implementation of FSR 2.2.1 is a backport from Unity renderer and has it's own problems which some of them avoided by OptiScaler. These implementations does not support Linux and will result black screen.

For Vulkan

• FSR2 2.1.2 (Default)
• FSR2 2.2.1
• FSR3 3.1.0 & FSR2 2.3.2
• DLSS

Compilation

Requirements

• Visual Studio 2022

Instructions

• Clone this repo with all of its submodules.
• Open the OptiScaler.sln with Visual Studio 2022.
• Build the project

Thanks

• @PotatoOfDoom for CyberFSR2
• @Artur for DLSS Enabler and helping me to implement NVAPI correctly
• @LukeFZ & @Nukem for their great mods and sharing their knowledge
• @FakeMichau for support, testing and feature creep
• @QM for continous testing efforts and helping me to reach games
• @Cryio, @krispy, @krisshietala, @Lordubuntu, @scz, @Veeqo for their hard work on compatibility matrix
• @RazzerBrazzer and DLSS2FSR community for all their support