In this paper, we develop a novel way of predicting the molecular solid-state based on a simplistic, coarse-grained model containing the dominant degrees of freedom driving crystalline phase formation. We focus on determining the packing behaviour of porous organic cages (POCs), discrete organic molecules which contain an internal cavity. Their porous nature leads to a variety of potential applications, including in catalysis, sensing, encapsulation 13 and molecules separations. Despite significant interest in POCs, their utilisation in industrial applications is hindered by the lack of understanding of how to control their assembly, both on a molecular level and in the solid-state. As techniques for predicting the molecular assembly of molecules become more refined, there still remains the question of how to predict and control the assembly in the solid-state.