Integrating a passenger into your taxi vehicle within Unreal Engine 4 involves several key steps. First, ensure your vehicle’s skeletal mesh includes a properly positioned socket at the desired seating location. This socket serves as the attachment point for the passenger character. In your character’s Blueprint, after detecting and approaching the taxi, use the “Attach Actor to Actor” node to link the character to the vehicle at this specific socket. Once attached, trigger the sitting animation, ensuring a smooth transition that enhances realism. This method effectively simulates a passenger entering and sitting in a vehicle within the game environment.