There's something meaningful about an empty park bench. There's a suggestion of narrative. Who has just left? Is someone about to sit down? It looks rather lonely. Where is everyone? Indoors, by a warm fire, no doubt! You might like to try using the branches in this scene to create a sense of three-dimensional space, or, you can leave some of them out to simplify the scene. Pay attention to the shape of the shadows: their shapes reaveal the shifts in the surface of the snow.

