Multisensory VR Experiences Based on Auralization and HBIM. The Teatro del Maggio in Florence

The paper presents an HBIM-based workflow for the development of multisensory virtual reality experiences integrating architectural visualization and acoustic auralization. Starting from laser scanner surveys and Nurbs-based 3D modeling, the research develops an HBIM digital twin enriched with material and acoustic metadata to simulate the sound behavior of theatrical spaces. The methodology combines TLS acquisition, semantic segmentation of architectural elements and materials, acoustic parameter classification, BIM data enrichment, and interoperability with Unreal Engine for immersive VR experiences. Through plugins and sound simulation systems, the virtual environment reproduces both the visual and acoustic perception of the theater, enabling users to interactively experience the architectural and acoustic heritage of the venue.