Virtual Reality (VR) enables users to explore and interact with immersive 3D environments, supporting high levels of sensory involvement, presence and interactivity. However, the same characteristics that make VR compelling also introduce design challenges. In immersive 360° environments, users are free to look and move without the constraints of a predefined frame, which increases cognitive load and may lead to spatial disorientation or loss of focus. These issues become even more critical in multi-user scenarios, where participants may need to coordinate attention, position and actions in order to maintain a coherent shared experience. Such challenges are particularly relevant in culture heritage applications, where immersive technologies are increasingly adopted as part of a broader process of digital transformation aimed at enhancing dissemination, education and public engagement.