@CONFERENCE\{IMM2004-03192,
    author       = "B. D. Larsen and N. Christensen",
    title        = "Simulating Photon Mapping for Real-time Applications",
    year         = "2004",
    month        = "jun",
    keywords     = "photon mapping, real-time, global illumination,graphics hardware",
    booktitle    = "Eurographics Symposium on Rendering",
    volume       = "",
    series       = "",
    editor       = "Henrik Wann Jensen, Alexander Keller",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3192-full.html",
    abstract     = "This paper introduces a novel method for simulating photon mapping
for real-time applications. First we introduce a new method for
selectively redistributing photons. Then we describe a method for
selectively updating the indirect illumination. The indirect
illumination is calculated using a new {GPU} accelerated final
gathering method and the illumination is then stored in light
maps. Caustic photons are traced on the {CPU} and then drawn using
points in the framebuffer, and finally filtered using the {GPU}.
Both diffuse and non-diffuse surfaces can be handled by
calculating the direct illumination on the {GPU} and the photon
tracing on the {CPU}. We achieve real-time frame rates for dynamic
scenes."
}