I am assuming that Bethesda addressed the rain collision issue since base building is going to be a feature of the game and having rain pouring into your house would be a HUGE oversight. However, I didn't see any wet shaders in the few seconds that they show rain. I don't know if its because they didn't think to include them or because it was only light rain or the rain just started. If you played the STALKER games or Dying Light you know that wet shaders for the ground and objects add a great deal to the atmosphere of a stormy night. Yes its a little thing but if someone could confirm that they saw wet shaders on objects if they played a demo at E3 I would be much obliged.