## 4 Discussion
### Set-Ups (Support and Format) and Technology Conditions  
The results of the analysis of the set-ups used provide a framework for future studies aimed at determining the differential impact of different immersive supports and formats on the intensity and qualities of sense of presence. It has been demonstrated that device type can influence reported levels of presence and, in turn, that the influence of the device depends on the characteristics of the virtual environment being viewed [1]. Thus, future research should continue to examine the differential impact of different virtual environment configurations and user profile characteristics on the intensity and characteristics of sense of presence. Similarly, the spectrum of supports examined needs to be expanded beyond the predominant HMD, and explore emerging technologies such as augmented reality, mixed reality and 360\({}^{\circ}\) video spheres, barely incorporated so far into this field of study. In addition, noting that HMDs are an emerging technology in continuous evolution, different HMD supports should be compared with the aim of analyzing the influence of their different features on users' perceptions of environmental variables and experience of sense of presence. This would make it possible to detect technological qualities beyond the type of support used, examining aspects such as ergonomics, interpupillary distance (IPD), optical quality, spherical and chromatic aberrations, focus distance and external light isolation.  
On the other hand, there is growing interest in more complex and hybrid formats that seek to increase multimodal immersion and activate emotional responses in participants. It is noteworthy that only two studies [12; 21] examined the case of a digital twin of a physical built environment. Researchers should incorporate a greater variety of multimedia formats, such as more detailed architectural simulations, extended reality environments and BIM methodologies to expand knowledge about the possibilities offered by different technologies in the architectural discipline. This will provide evidence on how different technological and architectural specific characteristics can affect the intensity and qualities of sense of presence.  
Other research has examined the effect of different multisensory configurations on sense of presence, agreeing on the importance of perceptual richness. It has been shown that using multiple audio channels [31; 59; 60] and adding spatial features to sound and spatialized audio [9; 59] increase sense of presence. Similarly, research has highlighted that the quantity and consistency of sensory outputs in a simulated environment are determinants of presence [23; 24; 32]. These results emphasize the importance of comprehensively studying the multiple sensory attributes of virtual environments to increase our understanding of sense of presence. It is clear that, irrespective of the device used, aspects such as visual, auditory and multisensory richness provide more immersive experiences. Therefore, future research should examine the interrelationships between technological qualities and the perceptual, cognitive and affective responses of different user profiles.