God rays, volumetric light, lens flares & dirt, visor reflections / water drops, depth of field, night & thermal vision scopes, dynamic wet surfaces with reflections, rainbows and many other effects.
Had the idea of making a shader for the suits visors (e.g. ecolog suit) in ordner to have some half-decent reflections going on the inside of the visor's glass.
Here's the result of my first test. Needs some refinement though. This is NOT part of version 1.1