Virtual Reality (VR) permits the creation of realistic-looking worlds where the user inputs are used to modify in real time the digital environment. Interactivity contributes to the feeling of immersion in the virtual world, of being part of the action that the user experiences. On the other hand, Augmented Reality (AR) technology refers to a perception of a physical real environment whose elements are merged with virtual computer-generated objects in order to create a mixed reality.

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