TY CONF TI Direct calculation of the optimal weight for MIS KW Monte-Carlo ray tracing KW bi-directional ray tracing KW photon maps KW reduction of noise KW multiple importance sampling KW weights JO International Conference "Computing for Physics and Technology - CPT2020" AU Ershov, S.V. AU Voloboy, A.G. AU Zhdanov, D.D. AU Zhdanov, A.D. AU Frolov, V.A. PY 2025 PB ANO "Scientific and Research Center for Information in Physics and Technique"