Few tips for tweaking the game:
http://steamcommunity.com/sharedfiles/filedetails/?id=324612199
All the tweaks make the game look better but particularly Planar Reflections, which makes a big difference in certain areas for example the shiny floor of the med room at the start of the game.
Also downsampling does help to combat the pesky AA issue. It seems the ingame AA settings are not very good so theres lots of jaggies. It seems at the mo changes made in Nvidia Inspector or Ati CCC dont have an effect so Downsampling is the only cure.
The game does look super sexy when downsampled.