This study perceives the developing process of a parameterization modeling in Grasshopper® for complex surfaces using building simulation, considering Annual Average of Hourly Radiation as the key-variable. The major goal of this article is to create, simulate and analyze through factorial analysis a modular canopy, based on Origami. The methodology applied consisted of the selection of the form, canopy parameterization, factorial analysis and simulation for radiation. Ladybug®, together with EnergyPlus™, were used to carry out the simulations. The object of study was the process of creation of a canopy. In countries with hot and humid climates, such as Brazil, the roofing areas are critical parts of building envelopes, highly susceptible to solar radiation. The simulation was performed for a full year for Vi¸cosa, MG (Latitude 20°45′14″S, Longitude 42°52′55″W, Altitude 648 m), but due to parameterization, the canopy can be simulated anywhere else. As main results, the factorial analysis contributed for determining that the slope of the canopy was the most robust factor to the detriment of the cardinal and collateral orientations. For the best case scenario, the simulation generated levels of comfort of about 74.0% with 15.4% Hot and 10.6% Cold for natural conditioned spaces.