PointerLockControls.js enables immersive first-person navigation using the Pointer Lock API, locking the mouse for smooth, unlimited camera rotation, ideal for PC-based 3D gallery tours. Compared to FirstPersonControls.js, it offers a more fluid, game-like experience but requires manual keyboard movement coding and a click to activate, unlike FirstPersonControls' simpler, ready-to-use WASD/ZSQD controls.