Achieving full autonomy requires a robust development ecosystem in which high-fidelity simulation plays a pivotal role. This presentation will explore Morai's simulation-driven approach, emphasizing the creation of realistic 3D digital twins using advanced photogrammetry and lidar technologies. Attendees will learn how scenario-based testing with realistic physical sensor models supports AV development by combining real-world and synthetic data. We’ll discuss how V2X technologies and open standards like ASAM OpenDrive and OpenScenario facilitate collaboration among top players. This session will deliver actionable insights into optimizing validation processes and creating scalable, efficient pathways to safer autonomous vehicle deployment.