NVIDIA DLSS 4.5 Ray Reconstruction Now Available: AI Fixes Path Tracing's Visual Artifacts

NVIDIA DLSS 4.5 Ray Reconstruction Launches for All RTX Users

NVIDIA has officially released DLSS 4.5 Ray Reconstruction through the Nvidia app, marking a significant milestone in AI-powered graphics rendering for GeForce RTX GPUs2

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. The update arrives three months after its initial announcement and addresses one of path tracing's most persistent challenges: visual artifacts that break immersion in ray-traced scenes1

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. This AI-based feature represents an iterative but meaningful upgrade to how modern games handle complex lighting calculations.

How Ray Reconstruction Tackles Path Tracing's Core Problem

Path tracing creates stunning lighting but generates noisy, artifact-filled images that traditional denoisers struggle to clean up effectively. When games enable full path tracing, players encounter smudged reflections, ghosting details, light trails that fade unnaturally, and dark corners that "boil" with digital noise1

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. The AI-powered neural rendering technique in DLSS 4.5 replaces hand-tuned denoisers with a Second-Generation Transformer AI trained on millions of flawless images1

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. Instead of smudging scattered light data together like a wet sponge, the AI analyzes 3D geometry and predicts how light naturally behaves, delivering sharper image quality in ray-traced and path-traced scenes2

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Second-Generation Transformer Delivers 35% More Compute Power

The new transformer model processes 20% more parameters and delivers a massive 35% boost in compute capability compared to previous versions1

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. This AI-driven improvement to graphics rendering enables deeper scene analysis and intelligently uses game engine pixel sampling and motion data to improve lighting accuracy and stability millions of times per second. Testing on an RTX 5080 setup showed no frame rate penalty whatsoever, while lower-end hardware like the RTX 5060 Ti (16GB) and RTX 5070 Ti experienced negligible drops averaging just 2 FPS1

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. However, older RTX 20 or 30 series cards with legacy architecture may see more noticeable performance impacts.

Real-World Testing Shows Measurable Visual Improvements

In Cyberpunk 2077 testing at 4K resolution, Ray Reconstruction demonstrated clear advantages over DLSS 4. The bright red glow from neon signs washed over floors in softer, blurrier spreads with DLSS 4, while DLSS 4.5 delivered tighter light bounces and higher-contrast reflections with sharper, concentrated red and cyan highlights on polished floor panels1

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. Testing also revealed sharper specular highlights and deeper contrast in darker areas without the fuzzy noise that plagued older denoisers. The biggest improvement wasn't simply sharper reflections but more natural handling of complex surfaces such as wet pavement3

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. These enhancements are particularly noticeable when examining still frames, though the differences become less apparent during active gameplay.

Activation Process and 30-Game Support Library

Enabling DLSS 4.5 Ray Reconstruction requires accessing DLSS overrides within the Nvidia app. Users must navigate to Settings, opt into Early Access releases, select a supported game under Graphics, scroll to Driver Settings, click DLSS Override - Model Presets, choose Custom, and select "Recommended" or "Preset F" from the Ray Reconstruction dropdown2

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. Alternatively, selecting "Global Settings" applies the updated Ray Reconstruction to every supported game simultaneously. The feature currently supports 30 games including Alan Wake 2, Cyberpunk 2077, Portal with RTX, Avatar: Frontiers of Pandora, Indiana Jones and the Great Circle, and Star Wars Outlaws2

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Upcoming Titles and Future RTX Remix Integration

NVIDIA announced that two major titles will receive DLSS 4.5 Ray Reconstruction and path tracing support next month: 007 First Light launching September 15 and Control: Resonant arriving September 24, 20262

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. Remedy's sequel will be the first major AAA title in 2026 to support this upgrade at launch. Upcoming releases like Phantom Blade Zero and Gears of War: E-Day are also set to receive the update soon. Beyond traditional games, NVIDIA is bringing the technology to various RTX Remix Mods including Quake III's RTX Remix Mod, Painkiller's RTX Edition, and The Elder Scrolls III: Morrowind's RTX mod2

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. This expansion into modded classic titles demonstrates how AI-powered graphics technology can breathe new visual life into older games, though those waiting for DLSS 5 will need to exercise patience as no timeline has been announced.