The Witcher 3: DLSS Neural Rendering on Linux | CachyOS + OptiScaler Guide

🍌 Get DLSS Neural Rendering working in The Witcher 3 on Linux using OptiScaler! In this step-by-step guide, I’ll show you how I set up DLSS Neural Rendering for the DirectX 12 version of The Witcher 3 on CachyOS. We’ll install OptiScaler, add NVIDIA’s DLSS Neural Rendering DLL, configure the Linux setup script, set the required Steam launch option, configure DLSS in-game, and finally verify through the OptiScaler overlay that Neural Rendering is actually running. ━━━━━━━━━━━━━━━━━━━━━━ 🖥️ MY SETUP ━━━━━━━━━━━━━━━━━━━━━━ • CachyOS / KDE Plasma • NVIDIA GeForce RTX 5070 Ti • AMD Ryzen 7 9800X3D • Steam • The Witcher 3 — DirectX 12 • OptiScaler ━━━━━━━━━━━━━━━━━━━━━━ 📖 CHAPTERS ━━━━━━━━━━━━━━━━━━━━━━ 0:00 Introduction 0:23 System & Game Setup 0:59 Install OptiScaler + DLSS Neural Rendering 2:55 Configure OptiScaler on Linux 3:52 Steam Launch Options 4:19 First Launch 4:36 Configure DLSS In-Game 4:56 Verify DLSS Neural Rendering ━━━━━━━━━━━━━━━━━━━━━━ 🔗 DOWNLOADS / RESOURCES ━━━━━━━━━━━━━━━━━━━━━━ OptiScaler + DLSS Neural Rendering v0.1.1.5-dlssnr: https://github.com/Dagherbou/OptiScal... DLSS-Updater v5.0.1: https://github.com/rakanki911/DLSS5-S... NOTE: The OptiScaler DLSSNR package does not include NVIDIA’s nvngx_dlssnr.dll. You will need to supply the Neural Rendering DLL separately. ━━━━━━━━━━━━━━━━━━━━━━ ⌨️ COMMANDS USED IN THE VIDEO ━━━━━━━━━━━━━━━━━━━━━━ 1️⃣ Copy OptiScaler into The Witcher 3 DX12 directory: cp -a ~/Downloads/OptiScaler-DLSSNR-v0.1.1.5/. \ ~/.local/share/Steam/steamapps/common/"The Witcher 3"/bin/x64_dx12/ 2️⃣ Enter the DX12 directory and verify the main OptiScaler files: cd ~/.local/share/Steam/steamapps/common/"The Witcher 3"/bin/x64_dx12 ls -lh OptiScaler.dll OptiScaler.ini nvngx.dll_dlsnr.dll setup_linux.sh 3️⃣ Verify the OptiScaler directory: ls -lh OptiScaler/ 4️⃣ Copy NVIDIA’s DLSS Neural Rendering DLL: This is the location used with my previously built DLSS5-Swapper payload: cp -a \ ~/Applications/DLSS5-Swapper/payload/streamline/nvngx_dlssnr.dll \ ~/.local/share/Steam/steamapps/common/"The Witcher 3"/bin/x64_dx12/ 5️⃣ Verify the Neural Rendering DLL: ls -lh nvngx_dlssnr.dll 6️⃣ Make the Linux setup script executable: chmod +x setup_linux.sh 7️⃣ Run the OptiScaler Linux setup: ./setup_linux.sh --filename=dxgi.dll --using_nvidia=y --using_dlss=y ━━━━━━━━━━━━━━━━━━━━━━ 🎮 STEAM LAUNCH OPTIONS ━━━━━━━━━━━━━━━━━━━━━━ WINEDLLOVERRIDES="dxgi=n,b" %command% --launcher-skip ━━━━━━━━━━━━━━━━━━━━━━ ⚠️ IMPORTANT DLSS5-SWAPPER NOTE ━━━━━━━━━━━━━━━━━━━━━━ For my setup, I source NVIDIA’s DLSS Neural Rendering DLL from the payload I previously built for DLSS5-Swapper. I am NOT using DLSS5-Swapper itself to perform the OptiScaler installation. On my current Linux NVIDIA driver, DLSS5-Swapper’s automated OptiScaler installation is blocked by its NVIDIA driver-version check, which expects a newer driver version than the Linux driver I’m currently running. That does not mean the Neural Rendering DLL itself is unusable. As shown in the video, I manually copy the Neural Rendering DLL from the DLSS5-Swapper payload into The Witcher 3’s DirectX 12 directory and complete the OptiScaler setup manually. ━━━━━━━━━━━━━━━━━━━━━━ ⚠️ PLEASE NOTE ━━━━━━━━━━━━━━━━━━━━━━ Linux gaming tools, NVIDIA drivers, OptiScaler, DLSS Neural Rendering, and related projects can change over time. If you’re following this guide with newer versions, some filenames, options, commands, or behavior may differ from what you see in this video. Always check the project release notes and documentation when using newer versions. ━━━━━━━━━━━━━━━━━━━━━━ 🍌 BANANANANERS ━━━━━━━━━━━━━━━━━━━━━━ If this guide helped you get DLSS Neural Rendering working, consider subscribing! BananaNaners is all about Linux gaming, PCVR, mods, performance tweaks, compatibility fixes, guides, gameplay, and livestreams. 🐧 Linux Gaming 🥽 PCVR 🔧 Mods & Tweaks 🎮 Guides & Gameplay 🔴 Livestreams 🍌 Same Games • More Freedom #LinuxGaming #CachyOS #TheWitcher3