Have you downloaded the latest DLSS? You can download here DLSS. It's a compressed file, unzip to Assetto Corsa root folder, should say "nvngx_dlss.dll" then. Now try again (after your advised reboot). Let us know whether you were succesful after this.View attachment 1523461
I get this when i try to use optiscaler. any help?
The addition of DLSS to Assetto Corsa (AC1) is a game-changer, and as of March 2026, it is officially available through the latest Custom Shaders Patch (CSP) updates. Since the original game engine doesn't support DLSS natively, CSP acts as the bridge to inject it.
EDIT #1: Below are instructions how to set DLSS in CSP (Latest)
EDIT #2: Seems the "nvngx_dlss.dll" needs to be in :/assettocorsa/extension/internal/ folder... (I thought in root folder, but hey, I'll will check this too...
Here is how to set it up:
1. Requirements
- NVIDIA RTX GPU: You must have an RTX series card (20, 30, 40, or 50 series).
- CSP Version 0.3.0 (Preview 338 or later): At this time, DLSS is primarily available in the "Preview" builds of CSP. You typically need to be a supporter of Ilja Jusupov (x4fab) on Patreon to get these cutting-edge builds before they hit the public "Recommended" release.
- Latest NVIDIA Drivers: Ensure your drivers are updated via the NVIDIA App or GeForce Experience.
2. How to Enable DLSS in Content Manager
Once you have installed the compatible CSP version (by dragging the .zip into Content Manager and hitting install), follow these steps:- Open Content Manager.
- Go to Settings (top right) > Custom Shaders Patch (top left).
- On the left-hand list, look for a new section titled Upscaler (or check under Graphics Adjustments if "Upscaler" isn't its own tab yet).
- Set the Active Upscaler to NVIDIA DLSS.
- Configure your settings:
- Upscaling Quality: Choose from Quality, Balanced, Performance, or Ultra Performance.
- DLAA (Deep Learning Anti-Aliasing): If your PC is powerful enough and you don't need the extra FPS but want the best image quality, look for the DLAA toggle or set the mode to "DLAA".
3. Fine-Tuning for 2026 (DLSS 4.5+)
Since the latest updates now support DLSS 4.5/5.0 features:- Ray Reconstruction: If you are using CSP’s experimental Ray Tracing features (like Screen Space Ray Tracing), ensure "Ray Reconstruction" is enabled in the DLSS settings for much clearer reflections.
- DLSS Swapper: If you want to use a specific version of the DLSS DLL (e.g., forcing version 4.5 into an older CSP build), you can use the DLSS Swapper utility or manually drop the nvngx_dlss.dll into your assettocorsa/extension/internal folder (though CSP usually manages this for you now).
4. Pro-Tip: Check the "Extra Effects"
DLSS works best when combined with CSP's Extra Effects. Go to Settings > CSP > Extra Effects and ensure TAA is disabled if you are using DLSS, as DLSS provides its own superior temporal anti-aliasing.Note: If the "Upscaler" tab is missing, it means your current CSP version is too old. Check the "About & Updates" tab in CSP settings to see if a newer Preview build is available.
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