special effect

The illusions used in the film, television, and entertainment industries to simulate the imagined events in a story are traditionally called special effects (a.k.a. SFX or SPFX). In modern films, special effects are usually used to alter previously-filmed elements by adding, removing or enhancing objects within the scene. The use of special effects is more common in big-budget films, but affordable animation and compositing software enables even amateur filmmakers to create professional-looking effects.
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Noun
1. an effect used to produce scenes that cannot be achieved by normal techniques (especially on film)
(hypernym) effect
(hyponym) stage effect

1- اثرات ويژه
2- جلوه هاي خاص
3- نيرنگ تصويري در صحنه