Explore the cutting-edge research on simulating supermassive black hole environments in this 58-minute conference talk by Dr. Héctor Olivares from Radboud University. Delve into the recent observations of Sgr A* and M87* by the Event Horizon Telescope (EHT) and learn how numerical simulations contribute to their interpretation. Discover the process of simulation-based modeling used within the EHT, including its limitations and proposed future improvements. Gain insights into the crucial role of large-scale environments in shaping horizon-scale flows around supermassive black holes. Examine a new simulation setup designed to incorporate large-scale information into event-horizon scale simulations, advancing our understanding of these complex astrophysical systems.