The document explains the distinction between visual effects (vfx) and special effects (sfx) in filmmaking, detailing that vfx involves computer-generated imagery added to live-action footage, while sfx uses tangible methods like prosthetics and pyrotechnics to create realistic illusions. It highlights the complementary nature of both effects, emphasizing that filmmakers choose vfx for safety and cost-effectiveness when achieving specific scenes directly on set is impractical. Additionally, the text discusses the importance of utilizing both types of effects to enhance audience engagement and storytelling in various media.