Feixas, MiquelRigau, JaumeBekaert, PhilippeSbert, Mateu2015-11-122015-11-1220021017-4656https://doi.org/10.2312/egs.20021049One of the main problems in the radiosity method is how to discretise the surfaces of a scene into mesh elements that allow us to accurately represent illumination. In this paper we present a robust information-theoretic refinement criterion (oracle) based on kernel smoothness for hierarchical radiosity. This oracle improves on previous ones in that at equal cost it gives a better discretisation, approaching the optimal one from an information theory point of view, and also needs less visibility computations for a similar image quality.