Generative Simulation Benchmarking for autonomous urban air mobility routing with inverse simulation verification Introduction: A Personal Journey into the Skies It was a humid summer evening in 2023, and I was staring at a terminal window filled with failed simulation logs. My team and I had been working on a routing algorithm for autonomous urban air mobility (UAM) vehicles—those futuristic eVTOL (electric vertical takeoff and landing) aircraft that promise to revolutionize city transportation. But something was fundamentally broken: our benchmarks were failing to capture the chaotic, real-world dynamics of dense urban airspace. I remember the moment of clarity vividly. I was reading a paper on generative adversarial networks (GANs) for traffic simulation when it hit me: what if we could use generative models not just to create realistic traffic patterns, but to benchmark the routing algorithms themselves?…