01471nas a2200217   4500000000100000000000100001008004100002653002500043653001300068653000900081653001300090653001300103653002000116653001500136653002100151100001500172700002100187245008400208856011500292520084600407       2012                            d10acomplex fenestration10aradiance10aBSDF10abuilding10adaylight10amaterial models10aphoton map10alight simulation1 aLars Grobe1 aStephen Wittkopf00aComplex fenestration and Radiance - a reality check from a user's point of view  uhttp://radiance-online.org/community/workshops/2012-copenhagen/Day2/Grobe/RW2012_GrobeWittkopf_EN-20120925.pdf3 aSupport for complex fenestration in lighting simulation has been in the
focus of recent Radiance development. The concept of contribution
coefficients has driven not only climate based simulation, but also
allowed to efficiently study variants for fenestration designs and to
derive the area-averaged BSDF from geometrical fenestration models.
With the new refined algorithms implemented in Radiance, we show from a
users point of view what solutions are currently offered to model
components of fenestration systems which are available on the market. As
a test case, an interior space is modeled in detail. Problems arising
from combining the new approaches to model complex fenestration when
aiming at daylight metrics currently in use and the transfer of measured
data are discussed. Fields for future development are proposed.