Mechanically Actuated Optical Surfaces for Switchable Appearances on 3D Objects
hcie.csail.mit.edu
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And a video demonstration/explanation https://youtu.be/KJK-DvgmRNs?is=k5HtcI5fsvnMAIyY
And a video demonstration/explanation https://youtu.be/KJK-DvgmRNs?is=k5HtcI5fsvnMAIyY