Buildings. GPU computing. ray-tracing. rooftop PV. solar gains. urban form. ArticleBianchi, Carlo Quantifying effects of the built environment on solar irradiance availability at building rooftops / aut. Carlo Bianchi, Matthew Overby, Peter Willemsen, Amanda D Smith, Rob Stoll, Eric R Pardyjak. -- ISSN : 19401493. -- 2-s2.0-85075744188. -- 000530631900006. -- 000498779200001. -- 10.1080/19401493.2019.1679259. --. Overby, Matthew. Willemsen, Peter. Smith, Amanda D.. Stoll, Rob. Pardyjak, Eric R In: Journal of Building Performance Simulation. -- ISSN 1940-1493.