Sometimes the hero of a scene is the setting. Think of the movie Avatar, with those incredible floating mountains on Pandora. With the rocks draped with jungle and nurturing mists, we came to care for the planet and we saw that not only was there power there, but also a natural bounty for those who respected it. This pulled audiences into the movie while at the same time giving important information that moved the story forward. This was where the last stand was going to happen between the evil corporate sappers and Pandora.
Even if your setting is not quite so powerful, it is important to the whole atmosphere of your scene and animation. Nothing ruins a great character design more than having it romp around in a poor setting. ...