Film actors, on the other hand, may work on location or in studios. On location shoots may take place in a variety of settings, from city streets to remote wilderness areas. Actors must be able to adapt to different environments and work in challenging conditions, such as extreme temperatures or long hours. In studio settings, actors may work on soundstages, which are large indoor spaces designed to mimic real-world environments. They may also work in front of green screens, which allow special effects to be added later in post-production.