Scientific virtual reality as a research tool in prehistoric archaeology: the case of Atxurra Cave (northern Spain)

Abstract

Highlights: This study proposes the practical utility of an immersive Virtual Reality (VR) experience for the dissemination and study of Palaeolithic Rock Art. Thanks to a series of multidisciplinary studies, a virtual reconstruction of the archaeological context of an area with rock art has been achieved. The Palaeolithic lighting systems documented in Atxurra cave have been virtually recreated, allowing real-time interaction through VR. Abstract: The Upper Palaeolithic period (ca. 45000 - 12000 BP) was the time when figurative art chiefly produced by Homo sapiens emerged and developed. The Upper Palaeolithic rock art entails a multisensory experience that goes beyond depicted images observation: it includes aspects related to the cognitive development of human mind, the spatial dimensions, the type of rock surface, artificial lighting, and challenges of navigating the underground environment. Traditionally, the study of Palaeolithic art in caves has focused on paintings and illustrated subjects' graphic analysis. However, a recent shift in methodological focus has favoured a comprehensive and interdisciplinary study of rock art. This new perspective has allowed the investigation of surrounding elements that significantly influence the art and its interpretation. Combining this with new digital technologies, it is now possible to reconstruct Palaeolithic artistic creation and contemplation environments with precision, offering researchers an immersive and interactive experience through virtual reality (VR). The two documented Palaeolithic lighting systems in the sector J “Ledge of the Horses” have been virtually recreated. The lighting simulation parameters are based on those obtained from an anthracological study of the charcoal remains found in the cave and the subsequent experimental program. The study included analysing both three-dimensional (3D) models of the cave, obtained through photogrammetry and laser scanning, and the lighting systems in the graphics engine ©Unreal Engine 5; this allowed the researchers to create an interactive VR environment that faithfully reflects the current state of scientific knowledge about the cavity. Using VR is a substantial methodological advancement, regarding both knowledge transmission and the creation of more robust and coherent archaeological interpretations through sensory perception and historical empathy. This approach has been applied to the main decorated sector of the Atxurra Cave (Basque Country, Spain), a space containing dozens of engraved and painted representations, and surface archaeological material, subjected to a comprehensive multidisciplinary study.