I am not sure that this very issue is discussed, because the screenie is too dark, but in case you are talking about white outlines on the edges then here is the http://www.gamesas.com/index.php?/topic/1243856-relz-uc-nature/page__view__findpost__p__19051679 by papill6n.
If you make the pic 100% size you should be able to see it, Any i don't think that is what is being discussed in that thread, the affect is like there are small twinkling lights on the edges of some textures, notice it on armor and tree branches. You can only really see it at night.