This paper presents a comprehensive review of the transformative impact of additive manufacturing on the fabrication of gas separation membranes, specifically focusing on its application in carbon dioxide separation. Additive manufacturing allows for the creation of complex geometries, such as triply periodic minimal surfaces, at a lower cost without the need for additional tooling. The exploration extends to the realm of four-dimensional printing, enabling dynamic alterations in membrane configurations in response to external stimuli, leading to the development of self-healing and self-assembling membranes. The review systematically examines the potential of additive manufacturing in carbon dioxide separation, emphasizing the utilization of triply periodic minimal surfaces in membrane modules. A detailed summary of compatible materials essential for successful additive manufacturing is provided. The gas transport mechanism in these membranes is discussed, highlighting the technology's potential to enhance carbon dioxide separation. Additionally, surface modification methods relevant to additive manufacturing are reviewed, addressing climate change concerns by improving carbon dioxide separation performance. In conclusion, this paper underscores the considerable advancements and environmental implications of additive manufacturing in membrane technology, offering a sustainable approach to gas separation processes. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.