Sets the minimum ray distance for ray traced reflection rays. Actual reflection ray length is computed as Lerp(MaxRayDistance, MinRayDistance, Roughness), i.e. reflection rays become shorter when traced from rougher surfaces. (default = -1 (infinite rays))
Usage
r.RayTracing.Reflections.MinRayDistance [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.