Street Canyon Sky View Factor

City streets lined with tall buildings trap outgoing radiation the way an open field never does, and that single geometric fact — the sky view factor — is one of the strongest drivers of the urban heat island. This simulator renders a real 3D street canyon built from instanced building blocks and lets you reshape it live: raise the buildings, narrow the street, and watch the sky view factor collapse toward zero. A simplified radiative-convective energy balance then runs a full day/night cycle for the canyon side by side with an open rural reference site, so the nighttime gap between their two temperature traces is the modelled heat island intensity in real degrees, not just an abstract ratio.