The outdoor big-screen TV at the park is a simple 3D design using fences, an object in the middle, and different flooring color. Due to space constraint, mine is merely a simple 3D design just for illustration.
I have seen some neighbors, who have more land to spare, created a much largest 3D TV, with an animated object in the middle (eg: Homer doing his stunt on the Whacking Day practice snakes).
http://i106.photobucket.com/albums/m271/property8singapore/TSTO/imagejpg7-1.jpg