Ark: Survival Ascended: Best DefaultEngine.ini for RTX DLSS 3.5

The secret to a stable 2026 experience is forcing the DLSS Ray Reconstruction path while disabling the engine’s redundant internal upscaling, which often conflicts with NVIDIA’s proprietary hardware scheduling.

File Path

Navigate to your local installation to find the engine configuration.

[Installation Path]\ARK Survival Ascended\ShooterGame\Saved\Config\Windows\Engine.ini

Technical Note: To enable Ray Reconstruction (DLSS 3.5), you must ensure your nvngx_dlss.dll and nvngx_dlssd.dll files are updated to version 3.5 or later in the Engine\Plugins\Runtime\Nvidia\DLSS\Binaries\ThirdParty\Win64 folder.

Optimized “DLSS 3.5 Ultra Stability” Configuration Block

Add these parameters under the [SystemSettings] header. This setup is designed for RTX 40-series and 50-series (2026 build) to maximize clarity during high-speed traversal.

Parameter	Recommended Value	Technical Purpose
r.NGX.DLSS.Enable	1	Vital. Forces the DLSS plugin to initialize.
r.NGX.DLSS.Preset	G	Uses the “G” preset (2026 update) for better foliage stability.
r.NGX.DLSS.RayTracing	1	Enables Ray Reconstruction for cleaner Lumen reflections.
r.NGX.DLSS.DilateMotionVectors	0	The Ghosting Fix. Prevents smearing behind moving dinosaurs.
r.OneFrameThreadLag	1	Synchronizes the CPU/GPU to prevent Frame Gen “hiccups.”

[SystemSettings]
r.NGX.DLSS.Enable=1
r.NGX.DLSS.RayTracing=1
r.NGX.DLSS.Preset=G
r.NGX.DLSS.DilateMotionVectors=0
r.NGX.DLSS.Sharpness=0.5
r.OneFrameThreadLag=1
r.AntiAliasingMethod=1
r.TemporalAA.Upsampling=0
r.VolumetricCloud=0 ; Massive FPS gain for exploration
r.VolumetricFog=0   ; Improves Ray Reconstruction clarity

HowTo: Engineering the Ultimate DLSS 3.5 Experience

Follow these GameEngineer.net technical steps to maintain a fluid $100\text{+ FPS}$ even on the Island’s densest jungles:

1. Frame Generation Selection: In the in-game settings, ensure NVIDIA DLSS Frame Generation is toggled ON. If you see “FSR Frame Gen” as an option, avoid it if you are on an RTX card; DLSS 3.5’s hardware optical flow is significantly more stable for ASA’s reactive foliage.
2. Lumen vs. Performance: ASA uses Lumen Global Illumination. If your FPS dips below 60 even with Frame Gen, use the console command r.DynamicGlobalIlluminationMethod 2. This switches Lumen to a screen-space hybrid, which is much easier for DLSS to reconstruct.
3. The “Resolution Scale” Trap: Never set your in-game Resolution Scale to anything other than 100 when using DLSS. Let the DLSS plugin handle the scaling internally (DLSS Quality/Balanced) to avoid “double-scaling” artifacts that blur the UI.
4. Reflex Latency: Always set NVIDIA Reflex to On + Boost. This is critical when using Frame Generation to offset the input lag introduced by interpolated frames ($L_{total} = L_{input} + L_{gen}$).
5. Denoising Stability: If Ray Reconstruction causes “flickering” on water surfaces, set r.Lumen.Reflections.Allow 0 in your .ini. While you lose some reflection detail, the overall image stability in 4K becomes rock-solid.

Technical Explanation: Dilated Motion Vectors and Frame-Time

In Ark’s Unreal Engine 5 environment, every leaf is a moving part. Traditional upscaling uses Motion Vectors to track where pixels move. By setting r.NGX.DLSS.DilateMotionVectors=0, we tell DLSS to use raw vector data rather than “dilated” (expanded) data.

In high-density games like ASA, dilated vectors often cause a “halo” or “smear” around dinosaurs and trees during fast camera movements. By disabling this and using DLSS Preset G, the AI model more accurately predicts the sub-pixel movement of foliage, ensuring that your $120\text{FPS}$ output ($F_{gen}$) looks as crisp as a native $60\text{FPS}$ render ($F_{base}$).