A camera is situated by default at the average height of human eye level (1.6
meters). When used with controls that receive rotation or position (e.g. from a
VR device) this position will be overridden.
<!-- Place camera at ground level (will be overridden by VR devices) --> <a-cameraposition="0 0 0"></a-camera>
When moving or rotating the camera relative to the scene, use a camera rig.
By doing so, the camera’s height offset can be updated by roomscale devices,
while still allowing the tracked area to be moved independently around the
scene.