This chapter approaches the subject of special effects as an ever-changing department that finds its growth in ever-changing technology. Entire books have been written on special effects, so it is not the intention here to write with that degree or scope. What this chapter will do is delineate the major kinds of special effects and the primary personnel that work on them. This chapter will also give a general overview of the personnel and process of visual effects. Visual effects can be differentiated from special effects. Special effects are effects created on set and sometimes in post-production. Visual effects are effects that are created digitally on set or in post-production.