Explore the fascinating world of active galactic nuclei through a comprehensive lecture on GRMHD and radiation transport models. Delve into topics such as density plots, extinction maps, and Monte Carlo simulations. Learn about thermal distributions, emission profiles, and the intricacies of Sagittarius A Star. Examine Compton bumps and their significance in astrophysics. Discover various modifications and tests in Monte Carlo code, including velocity adjustments and photon boosting. Investigate jet modeling, magnetic turbulence, and the shearing box approximation. Gain insights into the Athena MHD code and its applications in studying cosmic phenomena. Analyze turbulence plots and Harm data to deepen your understanding of active galactic nuclei and their complex behaviors.