3D CRAFT brings together leading heritage, conservation and research institutions in Britain and Ireland to discuss new ways of recreating and experiencing lost historic interiors. The fire at Clandon Park in 2015 destroyed one of the finest works of surface ornament of early 18th century Britain and Ireland, it has also exposed the underlying framework, allowing new insights into construction and craft processes. Using Clandon as a case-study of the problems facing heritage professionals across Britain and Ireland, this network will foster a collaborative cross-border interdisciplinary discussion around the digital processes that can capture and communicate multi-layered building fabrics in all their complexity, including virtual and augmented reality. National Trust is the largest conservation charity in Europe with expertise in the conservation of highly significant historic buildings and landscapes. The salvage of Clandon has demonstrated this expertise and has created opportunities to pioneer new technologies. NT has a strong track record of engaging in digital technologies and has collaborated with organisations like Google to test how VR, AR and MR can widen access. Craft Value (a four-year Irish Research Council funded project in the Department of Art History and Architecture, Trinity College Dublin) is exploring archives of buildings in Britain and Ireland that reveal contemporary building practices, including the types, numbers, skill levels, and origins of craftsmen involved, the techniques they employed, the types of materials they used and how they were sourced. The challenge of lost 18th century interiors is familiar to the Office of Public Works who have responsibility for historic buildings with lost or damaged interiors, such as the Four Courts in Dublin. New and developing technologies, from 3D Visualisation, Photogrammetry and Augmented Reality, combined with art historical methodologies offer opportunities to virtually reconstruct this lost heritage and present it to a wider audience using sustainable digital platforms. The network also includes experts in Computer Science, Electrical Engineering, and Digital Humanities from University College London, King's College London, the University of Surrey, and Trinity College Dublin, who are at the cutting edge of digital visualisation. The proposal aims for new levels of authenticity in the digital recrafting of lost and damaged interiors by retrieving greater amounts of data from photographs, film, and architectural fragments. The project will harness contemporary digital craft skills to elucidate the creative craft skills of the past, allowing them to speak to each other in a new virtual environment. Public engagement is a core objective. The digital reconstruction of this material will facilitate new ways to enhance visitor experience at historic properties; revealing lost architecture. New technologies have the potential to allow visitors to revisit the past, to inspect architectural fragments of lost buildings in their original context and to understand the fascinating processes behind the construction of historic interiors. The craftsmen responsible for these richly ornamented historic interiors remain largely unknown to the public. This project aims to cast new light on their achievements. There is public appetite for understanding how things were made in the past, reflected in visitor numbers to heritage sites across Britain and Ireland. Digital media have the potential to highlight craft techniques that normally remain hidden under the surface, allowing them to step forward in the historic narrative. In addition, there is scope to provide greater access to historic properties which are inaccessible to the public due to their continuing use for other purposes, for example, many prominent 18th century buildings are working government offices where visitors cannot be accommodated. Immersive 3D technologies can open such buildings up to all.