Natural light is one of the most important elements in architecture, helping to transform spaces and save energy. Day lighting design starts with the selection of a building site and continues as long as the building is occupied. This study is seeking to enhance buildings envelope facades with architectural aesthetic potential and optimizing daylight to boost both the quality of health and wellbeing as well as improving the building energy efficiency. The primary control of daylight should be made by the choice of the opening size and Position. This study tries to form the architectural composition of façade which can be Measured by using digital technology involved in building physics, through Computational process of cellular automata (CA). Cellular automata are the computational method which can simulate the process of Growth by describing a complex system by simple individuals following simple rules. The connection to architecture is the ability of cellular automata to generate patterns, which is useful to propose an innovative design strategy. © Research India Publications.