Illusive perspectives (forced perspectives) have been used in art and architecture to create certain space perceptions (e.g., let built space appear larger or deeper), space illusions (e.g., let persons or objects in certain positions appear larger or distorted) and artificial effects (e.g., nudge the visitor to stand at a certain position, i.e., forced perspective). To induce these spatial visual illusions, built spaces like hallways have been constructed such that visual cues induce increased depth if perceived by the visitor from a certain position. In our study, our aim was to determine how the properties of a distorted hallway (e.g., angle of the walls, amount of distortion) influence the perceived illusory space. We created a simplifiedVR model of an illusive hallway inspired by a historical example designed by Italian architect Francesco Borromini, and conducted a qualitative pilot study.
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