
If you look at the first area, in the bottom right, there's what appears to be a lake surrounded by land on all 4 sides. In fact we've no idea whether its surrounded by land on all 4 sides because we can't see below or to the right of it - so the map smoothing assumes its probably more land.
When we actually move down and scout a bit further, we then see that its not a single square lake, there's more water below it, so the game then switches which terrain tile it uses to display it... and then again when we scout another square and discover that the water extends further again.
Of course this is more noticable now because I'm not yet drawing the black 'fuzzyness' on the edge of the fog of war blackness, which I will do eventually. Once that's done it should cover up the bottom/right edges of that 4 sided lake so it doesn't look misleading.
But I just thought this was pretty cool/interesting :)
Edit: I just noticed looking at these screenshots again that it also changed the graphic for the right edge of the mountain ridge, once I'd scouted further around the mountain range and could see there was no more mountain below :)
Implode.