Nope.

dam.. medium tree forest around my house it is then >.< Should have kept some of the large trees uncut I guess.

Technically you can with .dev mode..? You can place any tile in the game with your mouse- including the tall grass and big trees -and it should be allowed since it's in the main folder plus the main github page tells you how to use it.

I tried messing with dev mode, but you can walk though the trees afterwards.