V 3.0: Lens flares & dirt, visor reflections / water droplets, god rays, depth of field, night & thermal vision scopes, dynamic wet surfaces with reflections, rainbows, volumetric light & fog, colored speculars and many other effects.
Lens dirt add-on. Completely over the top here, of course. Just to show the effect. Will be part of DS 3.0 and will be optional. Just for those who like the effect.