The shape of colour. The cave of San Michele on Monte Tancia (Italy)

Starting from the indications derived from the cartographic representation, the goal of the research project described in this paper was to experiment with different tests on the frescoed surfaces of rock-cut architecture for the visualization of the real shape of the subject. For the first time a 3D survey was carried out by the authors in the cave of San Michele on Monte Tancia to test different techniques of processing the numerical models in order to achieve the plane representation of random surfaces, including those with the frescoed plaster. This activity is part of a broader research program related to the investigation of rupestrian architecture, addressing problems of data representation.