Holo-SDK enables normal computer displays to simulate depth and 3D perspective without the need for additional hardware. Using a webcam to track the user's viewing angle this Unity3D utility makes it appear like something is floating in front of the display. It's free to make demos but has a time limit unless you subscribe. There is also a 1 year free educational license available to help teachers incorporate this into your classroom curriculum, and with so many remote learners it would be great to see this in use as a way to make lessons a bit more engaging for students.
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