You can get murals from any of the wall paper design books, shops, websites, etc.
My uncle did this kind of thing down in the basement. It has a mural of a lake with an eagle and mountains on one wall. He has a wall covering that is very much like a log cabin, I think it is just a type of paneling.
He wrapped the structure poles with birch bark wallpaper.
He has a closet that juts out and he put rustic paneling, painted it red and carved a crescent moon in the door, instant outhouse/storage closet. He used outside furniture, cedar rockers and Adirondack chirs. The carpet is a deep tan and my Grandfather made rug hook area rugs that look like leaves.
There are no dead animals.