Water tiles

There are different water tiles in UnReal World:


 * rivers
 * rapids (doesn't freeze in winter)
 * water
 * lakes
 * sea

Water tiles are always lower than dry land, with deeper water being further down. This can have strange results when ranged weapons are used while swimming or rafting in deep water such as arrows flying far off into the distance or hitting shallower water like it would the side of a hill.