It has become necessary to achieve thermal comfort for users in buildings, which enhances human ability to work, create, or rest and enjoy. Since the building envelope serves as the link between the inside and outside of the building, forming the building envelope creatively improves and enhances thermal performance of buildings, thus achieving thermal comfort for users. Nature is the primary teacher and source of creativity for humans. Therefore, Biomimicry was chosen as a tool for creative formation, and the descriptive analytical approach was used by analyzing an example where nature was simulated in the formation of the external envelope of the building. By studying the impact of this on the building's thermal performance, the research concluded the importance of forming the external envelope of the building and its direct effect on the building's thermal performance, highlighting the effectiveness of the biomimicry approach as a tool for creative forming.