Virtual-Physical Synchronization and Spatial Extension of Digital Twin Exhibition Spaces

This study proposes a technical approach for digital twin exhibitions by presenting a method for real-time synchronization and extension of physical and virtual exhibition spaces in a CAVE-based virtual reality environment.Existing virtual exhibitions have focused on visual representation, limiting spatial continuity, embodied movement, and the maintenance of presence in on-site exhibition experiences.This study designs and implements a digital twin exhibition system integrating vision-based user tracking, virtual-physical space synchronization using Unreal Engine 5 and nDisplay, and a user position-based exhibition space expansion mechanism.The proposed system sequentially maps multiple virtual exhibition spaces onto a limited physical CAVE environment, enabling continuous exhibition paths through natural walking-based navigation.A case-based experiment confirms the system's feasibility and stable operation,