Volumetric Fog Scalability.ini Fix

Volumetric Fog Bug

Still relevant as of patch v1. 512. 105

There's currently a bug with the Shadow Quality settings that causes Medium Shadows to have the same Volumetric Fog settings as Ultra Shadows (yes, in Oblivion Remastered, Shadow Quality also affects Volumetric Fog).

This can lead to a performance loss of up to ~5%.

Here’s what happens:

If you set Shadow Quality to Ultra, it cranks up fog detail with settings like GridPixelSize=8 and GridSizeZ=128.

If you set Shadow Quality to High, it lowers down fog settings to GridPixelSize=16 and GridSizeZ=64.

If you set Shadow Quality to Medium or Low, nothing happens to the fog.

This means that if you switch directly from Ultra to Low or Medium, the Ultra fog settings just stay on.

Even worse - this also happens when you close and re-open the game. If your Shadow Quality is set to Medium, the game defaults to Volumetric Fog values equivalent to Ultra, so they'll just stay that way. Unless you go into the options and manually scroll to High and then back to Medium, you're stuck with Ultra fog even on Medium shadows.

In practice, this only affects Medium Shadow Quality, since at Low the game completely turns off Volumetric Fog, even though the values are still wrong at Low.

This mod fixes the issue with a modified Scalability.ini file containing the missing fog settings:

r. VolumetricFog. GridPixelSize=16

r. VolumetricFog. GridSizeZ=64

r. VolumetricFog. GridPixelSize=16

r. VolumetricFog. GridSizeZ=64

Install Instructions

Exit Oblivion, if it's open.

Navigate to "C:\Users\<Your Username>\Documents\My Games\Oblivion Remastered\Saved\Config\Windows"

Option 1: Download the Scalability.ini file from this mod. Place the file in the above folder, replacing any existing one.

Option 2: Open the existing Scalability.ini in the folder you navigated to (use notepad or similar app). Copy the file contents from above (in the "Fix" section). Paste the contents inside that file and save.

Conflicts / Troubleshooting

If you're using other mods that tweak Scalability.ini, you should install using option 2. This should prevent conflicts.

The file does NOT need to be Read-only to work. In my experience, the game does not delete or alter you