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A comment on Pepper's Cone: An Inexpensive Do-It-Yourself 3D Display.

Re:Pepper's Cone: An Inexpensive Do-It-Yourself 3D Display by rrauenza on Tuesday January 02, 2018 @01:34PM (#16054069)
I'd seen this before:

http://www.instructables.com/id/Turn-cell-phone-and-tablet-i...

..but it uses a prism shape, not a cone.

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Re:Pepper's Cone: An Inexpensive Do-It-Yourself 3D Display by pbhjpbhj on Tuesday January 02, 2018 @04:25PM (#16055839)
Mentioned in the video of the OP at 38s+.
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