Announcing: A Dark Night In London (FC)

[lllDash]

Doing outdoor maps with amnesia does present with a few challenges. terrain is probably the biggest problem. Try adding short but wide hills (I'm sure you can repurpose the game's debris) and then place the grass and trees on top in somewhat large quantities. This will give it a more natural look to it.
I don't think people should get too discouraged if their outdoor maps don't look amazing because Amneisa isn't great for that sort of thing. I mean, even the outdoor map in The Dark Descent main campaign looked average at best.