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In the 1940s, modern Rio de Janeiro architects developed passive systems to improve buildings performance, without resorting to air conditioning systems. This article continues a research that studies the performance of a set of eight buildings, from the Carioca School, investigating in a prospective sense, how to improve their performance through computational methods. The authors select a new case study from these buildings, the Bristol building, and analyse the building performance, regarding insolation and illuminance, using the software Ladybug and Honeybee. Based on the simulation data, they use combinatorial modelling to change the position of each of the shading type’s modules, of the Bristol west façade to improve performance. Results suggest that is possible to improve the building performance, and the modern buildings legacy, using computational methods to improve and reduce energy consumption, encouraging natural systems and diminishing the need for artificial air conditioning systems.