Immersion in virtual reality for studying architectural perspectives

What is the relationship between a viewer and a quadratura when the viewer gazes on this Architectural Perspective? In many cases, the viewer may be in different positions with respect to the centre of projection used to make the perspective while continuing to enjoy the illusory effect, but what are the perceptual sensations received from the depicted imaginary space? What elements condition the inclusion of the viewer? Can the use of Virtual Reality enhance the degree of inclusion, making the link between viewer and perspective more immersive? This contribution presents answers to these questions, using the Sala dei Cento Giorni painted by Giorgio Vasari in 1546 as an application. The numerous possibilities offered by Virtual Reality are implemented in the room, from the insertion of spherical images in visors with stereoscopic mode capable of creating full immersion, to viewing illusory digital spaces verified by different points of view, as well as perceptual control of the relationship between three-dimensional model and two-dimensional frescoes. Virtual Reality turns out to be a powerful tool of analysis and interpretation for this widespread cultural heritage.