García, R.Ureña, C.Sbert, M.Holly Rushmeier and Oliver Deussen2015-02-282015-02-2820121467-8659https://doi.org/10.1111/j.1467-8659.2011.02081.xThis paper presents an analysis of the irradiance estimator often used in photon mapping algorithms and concludes that the classical approach with a constant kernel overestimates the correct value. We propose a new estimator that solves this problem and provide both theoretical and empirical studies to verify it.Description and Solution of an Unreported Intrinsic Bias in Photon Mapping Density Estimation with Constant Kernel10.1111/j.1467-8659.2011.02081.x