@MISC\{IMM2012-06235, author = "A. Schou", title = "Investigation of light pipe simulation algorithms", year = "2012", publisher = "Technical University of Denmark, {DTU} Informatics, {E-}mail: reception@imm.dtu.dk", address = "Asmussens Alle, Building 305, {DK-}2800 Kgs. Lyngby, Denmark", note = "Supervised by Associate Professor Jeppe Revall Frisvad, jrf@imm.dtu.dk, {DTU} Informatics, and Nicolas Roy from {VELUX} A/S.", url = "http://www2.compute.dtu.dk/pubdb/pubs/6235-full.html", abstract = "The subject of this thesis is to test whether progressive photon mapping and/or stochastic progressive photon mapping can be used in daylight simulations of interior of a room with a light pipe introducing natural lighting into the room. The algorithms tested (progressive photon mapping and stochastic progressive photon mapping), are both multi-pass algorithms that solves global illumination in a robust way with bounded memory consumption, while converging to the correct solution. To simulate the sky the {CIE} [DK02] standard sky patterns have been used which returns the luminance of an arbitrary sky element. In the tests a model of the {VELUX} {TRM} 010 Sun tunnel was used. The results obtained from progressive photon mapping and stochastic progressive photon mapping have been tested against the analytical solution {HOLIGILM} [KDK08], and an implementation of path tracing." }