researchers are exploring ways to introduce heterogeneity into photopolymers for additive manufacturing, potentially allowing for more control over the material's microstructure. studies are examining the effects of various processing parameters and techniques, such as vat photopolymerization and photoiniferter polymerization, on the morphology of these materials. the goal appears to be to better understand and regulate the properties of photopolymers, although the specific outcomes and applications of this research are not clear.