OptiScaler (was CyberXeSS) is drop-in DLSS2 to XeSS/FSR2/FSR3/DLSS replacement for games.

This project is based on PotatoOfDoom's excellent CyberFSR2.

Official Discord Server: DLSS2FSR

Do not use this mod with online games, it might trigger anti-cheat software and cause bans!

How it works?

OptiScaler implements all necessary API methods of DLSS2 & NVAPI to act as a man in the middle. So from games perspective it's using DLSS2 but actually using OptiScaler and calls are interpreted/redirected to XeSS & FSR2 or DLSS with OptiScaler's tweaks and enchancements.

Features

• Supports multiple upscaling backends (XeSS, FSR 2.1.2, FSR 2.2.1, FSR 3.1, DLSS)
• Supports DLSS 3.7 and above (check installation for 3.7 specific 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's Ultra Performance, NativeAA modes (Not using XeSS 1.3 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 with Dx12 upscalers
• Output Scaling option (0.5x to 3.0x) for backends running on Dx12 & Dx11 with Dx12
• 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 and RTX Remix)
• Supports loading specific nvapi64.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

Installation

Install as nvngx.dll

• Download the latest relase from releases.
• Extract the contents of the archive next to the game executable file in your games folder. [1]
• Run EnableSignatureOverride.reg and confirm merge. [2][3]
• DLSS option should be appeared/enabled in games settings. If it's not, you may try using methods explained here.

[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.

Installation for DLSS 3.7 and above as non-nvngx

With DLSS 3.7 Nvidia disabled signature check override, this means nvngx.dll or _nvngx.dll must be signed by Nvidia. For this override I am using a method developed by Artur (developer of DLSS Enabler). Also this method increases compatibility of OverlayMenu. OptiScaler supports being loaded by these filenames:

• dxgi.dll (with Nvidia GPU spoofing for non-Nvidia cards)
• winmm.dll
• version.dll
• wininet.dll
• winhttp.dll
• OptiScaler.asi (with an ASI loader)

Step-by-step installation (Nvidia users please skip step 1 & 2):

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. 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 games exe folder to nvngx.dll.
3. Rename OptiScaler's nvngx.dll to one of the supported filenames (I prefer dxgi.dll, it also eliminates the need for d3d12 proxy) and copy it to the games exe folder.

Linux users should add renamed dll to overrides:

WINEDLLOVERRIDES=dxgi=n,b %COMMAND% 

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

Shader Compilation error on Linux

If you are using OptiScaler with Linux and you have problems with RCAS or Output Scaling, you will probably see this message in your logs.

CompileShader error compiling shader : <anonymous>:83:26: E5005: Function "rcp" is not defined.

To solve this problem you need to install d3dcompiler_47 with WineTricks or ProtonTricks. OptiScaler uses custom shaders for these features and depends on this compiler file to compile these shaders at runtime.

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

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.

Configuration

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

Known Issues

Please check this document for known issues and possible solutions for them. (Will be updated)

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 upscaler)
• FSR2 2.1.2
• FSR2 2.2.1
• FSR3 3.1.0 & FSR2 2.3.2
• DLSS

For DirectX 11

• FSR2 2.2.1 native DirectX11 implementation (Default upscaler)
• XeSS 1.x.x with background DirectX12 processing [*]
• FSR2 2.1.2 with background DirectX12 processing [*]
• FSR2 2.2.1 with background DirectX12 processing [*]
• FSR3 3.1.0 & FSR2 2.3.2 with background DirectX12 processing [*]
• DLSS native DirectX11 implementation

[*] 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 upscaler)
• 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