When arms aren’t following the camera in a 3D environment or virtual reality, it’s often due to incorrect rigging or misaligned camera settings. The issue may arise from improper synchronization between the camera movement and the arm’s IK (inverse kinematics) system. Checking the bone structure, ensuring the arms are parented correctly to the camera, and adjusting the rotation constraints can usually fix the problem. Calibration and software updates might also help improve tracking.