Represents the radius scale factor of the dithered noise applied on the rough refraction UV sample. A value of 1 means that the UV offset will be rotated on circle of radius = pixel standard deviation. A large value can confuse TAA/TSR and result on color splotches. Disabled when 0, accept [0,1] range.
Usage
r.Refraction.Blur.DitheringScaleFactor [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.
