We present a real-time system for collaboratively reconstructing dense volumetric models of large 3D scenes (see Figure 1). Reconstructing such models is important for many tasks – e.g. content creation for films and games [10], augmented reality [19], cultural heritage preservation [21] and building information modelling [14] – but capturing large scenes can take significant time, and the risk of transient changes to the scene (e.g. people moving around) goes up as the capture time increases...