Stands for Immersive Projection Technology, refers to the general class of devices of which the CAVE is part of. The reason that the name CAVE was not universally adopted is that VRCO (makers of CAVELib) own a trademark to the name CAVE. An IPT device generally consists of one or more large projection screens on which stereoscopic images are projected. Because a significant portion of the users field of view is encompassed by the projection screens an IPT device can create an illusion of immersion for the user.

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