A Visual Effects (VFX) Artist in the movie industry creates and integrates computer-generated imagery (CGI) and other special effects into film and video to enhance the visuals beyond what is possible with traditional filming. They work on a variety of tasks, from pre-production planning to post-production enhancement, using specialized software to bring the director's vision to life. 

A movie production assistant (PA) is an entry-level position responsible for supporting the crew with a wide range of on-set and administrative tasks, from delivering scripts and call sheets to running errands and managing the set. PAs work under the direction of the production manager, producer, or director and are crucial for keeping a production running smoothly. 

A script supervisor in movies is a continuity expert who monitors the production to ensure a film can be edited together seamlessly. They track visual and verbal continuity, making detailed notes on dialogue, actions, props, wardrobe, and other elements to prevent errors. They represent the editor on set and work with the director and other departments to maintain the integrity of the story from the first day of shooting through post-production. 

Principal Actor