This is an official Meta-published Unity sample repository demonstrating the Passthrough Camera API for Quest 3/3S headsets. It contains five distinct sample scenes: CameraViewer (live camera feed display), CameraToWorld (camera-space to world-space coordinate mapping with debug visualization), BrightnessEstimation (ambient light estimation from camera pixels), MultiObjectDetection (real-time object detection using YOLO via Unity Sentis, with 3D marker spawning), and ShaderSample (water shader using camera texture as reflection source). The architecture is a collection of independent scenes, each with its own manager MonoBehaviour and shared utility scripts (InputManager, DebugUIBuilder). The project targets Android via OpenXR and the Meta XR SDK (MRUK 85.0.0), with hand tracking and controller support. It is a learning resource, not a production application, but the code is well-structured with consistent conventions and several reusable patterns.