The rapid growth of additive manufacturing has enabled the broad application of lattice structures in various engineering fields. The challenge of fitting lattice structures into the final product necessitates using different software packages. Rhinoceros’s extension Grasshopper allows the incorporation of various morphological distributions of unit cells into simple and complex product designs. This work aims to design an algorithm to successfully fit unit cells on rectangular and curved surfaces in a lattice structure. In contrast, the relative density of the lattice structure remains constant. The ultimate goal of this work is to define a Grasshopper algorithm that will allow unit cells of lattice structures to fit into more complex product designs while ensuring that the material usage for the additive manufacturing of the lattice structure remains constant.