Shooting in woods and on difficult hills

This may be a simple one to answer. If an element of bows is shooting at another element and both on a difficult hill or in a wood, then the range is max 0.5 B/W? If the same now element was just inside the wood, but within 0.5 B/W of the edge it could shoot out to max distance of 3B/W away if the wood is surrounded by good going say. Moral is to just hide the bows in such islands, as can fire out and their close combat factors not adversely affected...