The attached screenshot shows my longbowman who wants to shoot at a city 3 hexes away. He isn't allowed to do this. He has 3 range. The hex is visible. I'm assuming he isn't being given line of sight. I have however drawn a helpful red line on the screenshot that shows the line of sight travels through clear hexes. It does not pass through the rough hexes on either side. Perhaps someone else can check and see if there's another reason why the longbowman can't shoot. Version 621.