The simulations were performed at very low density to ensure the clusters formed had no mechanical stress or structural defects. Within our simulations, we had a 50:50 mixture of two types of truncated tetrahedral particles which had the two different "chirality" of patches (Fig. (b)). The interactions between the cages were not biased, such that it would be equally likely for cages of the same or different chirality to interact. Therefore if the cages preferably form a homochiral crystal, we would expect the simulations to form two separate clusters with only one isomer of the cage. Alternatively, if interactions between different chirality interactions are preferable, only one cluster would form with a racemic mixture of the isomers.