special effects

US /ˌspeʃ.əl ɪˈfekts/
UK /ˌspeʃ.əl ɪˈfekts/
"special effects" picture
1.

illusions or visual tricks used in films, television, or video games to simulate imagined events or to enhance reality

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The movie was praised for its stunning special effects.
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Modern blockbusters rely heavily on computer-generated special effects.
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visual effectsVFXSFXmovie magic
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specialspecializedspeciallyspecializespecialityeffectiveeffect