Do you really want to send Webster 1913 a message saying you like their work?
In VR, the light source placed at the viewer's position facing forward that rotates and translates with the viewer in order to provide illumination of objects being viewed. In well-designed VR you probably shouldn't have to use one.
Head"light` (?), n. Engin.
A light, with a powerful reflector, placed at the head of a locomotive, or in front of it, to throw light on the track at night, or in going through a dark tunnel.
© Webster 1913.
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