Basically projected lights (like the helo headlight, Illumination flares and counter measure flares etc) cause a large, square light shape to be projected on the terrain rather than their normal smooth cone.
Not every light is affected during play, it seems to be when there are a lot of lights sources illuminating at once. Like over a new AO in domination for example. I'm not 100% about this though.
I tried changing shadow settings but that made no difference.
Anyone familiar with it or know how to fix it?
I searched here and dev heaven but could find no mention of the problem.