LightingSettings.filteringGaussRadius is obsolete in Unity 6

Unity 6 replaced the integer filteringGaussRadius lightmap settings with float filteringGaussianRadius properties for AO, direct and indirect lighting.

Status
Obsolete since Unity 6.0 · Lighting
Old
filteringGaussRadiusAO, filteringGaussRadiusDirect, filteringGaussRadiusIndirect
New
filteringGaussianRadiusAO, filteringGaussianRadiusDirect, filteringGaussianRadiusIndirect
Checked
2026-10-05, against the sources below

What changed

Lightmap denoising settings set from code changed type in Unity 6. The integer filteringGaussRadius properties are replaced by float filteringGaussianRadius properties, so the Gaussian filter radius can now be set in fractions.

Rename the property. Integer values still assign to a float, so most code only needs the new name.

Before and after

Before
C# 
settings.filteringGaussRadiusAO = 2;
1 line
After
C# 
settings.filteringGaussianRadiusAO = 2f;
1 line

Fix it automatically

Paste a script into the Unity 6 Script Upgrade Checker and it applies this rename for you, along with the other safe fixes for your target version.

Open this example in the checker

Questions

Does this change my existing lightmaps?
No. It only affects scripts that set the denoising radius through LightingSettings. Lighting settings assets and baked lightmaps keep their values.
Can I now use fractional radius values?
Yes. The new properties are floats, so a radius such as 1.5 is valid. Integer values still assign without a cast.

Sources

Related Unity 6 changes

Every Unity 6.x change, by version