Dive into the mechanics of the Spark AR engine in this 41-minute conference talk from F8 2019. Explore how AR experiences are optimized for performance and delivery across various consumer contexts and mobile devices. Discover techniques that empower creators with greater control and quality assurance, ensuring their Spark AR experiences are maximized for all users. Learn about the Augmented World, Immersive AR, and how AR is integrated into communities. Understand the Spark AR Engine's optimization strategies, including Selective Optimization and Performance Prediction. Gain insights into Face Tracker and World Tracker technologies, as well as delivery methods through mobile apps and asset limit considerations.