Illusions

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What is an illusion?
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An illusion is a perception that does not match the physical reality of the object being perceived. Illusions can occur with any of the human senses, but they are most commonly associated with vision. Visual Effects (VFX): Computer-generated imagery (CGI) is commonly used to create illusions of fantastical creatures, locations, or events that do not exist in reality. Modern VFX and CGI can be incredibly realistic and convincing, especially in big-budget productions.