r.MotionBlurQuality
VarUnreal Engine Var console variable.
rMotionBlurQuality
Description
Defines the motion blur method which allows to adjust for quality or performance 0:off, 1:low, 2:medium, 3:high (default), 4: very high
Usage
r.MotionBlurQuality [value]Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.

