Whether to draw positions that indirect lighting is interpolated at when they are updated, which are stored in the cacheProbably need 'r.CacheUpdateEveryFrame 1' as well to be useful, otherwise points will flicker as they update0 is off (default), 1 is on
Usage
r.Cache.DrawInterpolationPoints [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.