The UrbanDaylight is a Rhino5 and Grasshopper plugin that allows designers to simulate and evaluate the daylight potential of large urban designs. The tool automates exterior DAYSIM simulations for all buildings in the city model. Given the solar radiation on the facades, it uses a generalized impulse response to compute the interior illumination on an hour by hour basis. This allows us to use the data for climate based metrics. You can download the paper here and the pdf slides form the SimBuild 2012 presentation here. Image credits: “Kendal Square Redesign” student design project at MIT Urban Modeling Seminar – by James Perakis and Josh Westerhold.