special effects (F/X, SFX, SPFX, or EFX)

Special effects is the broad term for fantastical audio and visual illusions that could not have been filmed by normal means. Special effects include in-camera effects, miniatures, CGI, rear-camera projections, and stop motion animation. "Visual effects" are a subcategory of special effects. Special effects is often abbreviated to F/X, SFX, SPFX, or EFX.