In this paper, we propose an approach for calculating global illumination by the radiosity method that allows achieving high performance for a large number of patches involved in the calculations. Two key ideas of the proposed approach are the creation of proxy geometry based on axis-aligned virtual patches and the method of temporal radiosity, which uses the interpretation of form-factors in terms of probabilities. The combination of the proposed methods makes it possible to obtain a rapid update of global illumination for light sources changing their positions with image quality close to the naive radiosity method.

global illumination, radiosity method, geometry simplification

Mathematical modelling in actual problems of science and technics

Alexander Stanislavovich Shcherbakov,  ,  orcid.org/0000-0002-5360-4479,  Lomonosov Moscow State University

Frolov Vladimir Alexandrovich,  ,  orcid.org/0000-0001-8829-9884,  Lomonosov Moscow State University; KIAM RAS

Galaktionov Vladimir Alexandrovich,  ,  orcid.org/0000-0001-6460-7539,  KIAM RAS