Fallout 4 VR: Fixing “Blurry Textures” via Config File Edits

The fix involves two main steps: forcing the game to render at your headset’s native scale and tuning the TAA parameters to act as a sharpener rather than a blur filter.

File Path & Setup

1. Navigate to: Documents\My Games\Fallout4VR\
2. Locate/Create: Fallout4Custom.ini
3. Pro Tip: If textures still appear low-res, ensure your Windows desktop resolution is set to at least 1440p (or use NVIDIA DSR) as the game engine occasionally uses desktop resolution to set the VR texture pool.

Optimized “Clarity” Configuration Table

Parameter	Recommended Value	Technical Purpose
fRenderTargetSizeMultiplier	1.0	Crucial. Sets internal SS to 100%. Scale up via SteamVR instead for better performance.
sStartingConsoleCommand	cl off;taa on	Disables character “rim lighting” and ensures TAA is active for our tuning.
fTAAPostSharpen	0.70	Applies a sharpening pass after the TAA blur.
fTAASharpen	1.0000	Adjusts the edge detection strength of the anti-aliasing.
fTAAHighFreq	0.8000	Preserves fine details in textures like metal and wood.

[General]
sStartingConsoleCommand=cl off;taa on

[Display]
fTAAPostSharpen=0.70
fTAASharpen=1.0000
fTAAHighFreq=0.8000
fTAALowFreq=0.5000
fTAAPostOverlay=0.70

[VRDisplay]
fRenderTargetSizeMultiplier=1.0

HowTo: Engineering a Sharp Wasteland

Follow these GameEngineer.net technical steps to finalize your visuals:

1. Disable Dynamic Resolution: In the in-game settings (under Performance), ensure Dynamic Resolution is OFF. This feature is the #1 cause of sudden “blur spikes” as it drops resolution to maintain frame rate.
2. The “iSize” Fix: If your game looks like a tiny window in the headset, add iSize H=XXXX and iSize W=XXXX to the [Display] section of your Fallout4Custom.ini, matching your headset’s per-eye resolution.
3. Upscaler Mod (2026 Update): For the best results in 2026, install the Fallout 4 VR Upscaler mod from Nexus. It replaces the engine’s TAA with DLAA or DLSS, which provides significantly better edge clarity than .ini tweaks alone.
4. Texture Mipmapping Bug: If textures look like “mashed potatoes,” add iTexMipMapSkip=-1 to the [Display] section. This forces the engine to load the highest quality mipmap level regardless of the distance.
5. SteamVR Supersampling: Since we set fRenderTargetSizeMultiplier to 1.0 (Native), you should now use the SteamVR Per-App Video Settings to increase the resolution to 120%–150%. This is more efficient than the game’s internal scaler.

Technical Explanation: TAA Post-Sharpening

Fallout 4 VR uses Temporal Anti-Aliasing, which averages color data from previous frames to smooth current edges. While this eliminates “pixel shimmering,” it naturally causes a heavy blur ($B_{total}$).

By introducing fTAAPostSharpen, we apply a high-pass filter over the final image. This doesn’t remove the TAA blur, but it mathematically re-introduces edge contrast ($C_{edge}$). When balanced correctly (around 0.70), the sharpening cancels out the perceived softness of the TAA without creating “halos” or artificial noise, effectively “fixing” the blurry texture perception while keeping the world shimmering-free.