In the past few years, we have covered plenty of amazing 3D printed optical illusion here. This 3D Printable Impossible Slide Optical Illusion is also worth a look. It produces the illusion of the balling rolling uphill.
More gadgets like this: here
Impossible Gravity Slide Illusion [Secret Revealed!]
![Impossible Gravity Slide Illusion [Secret Revealed!]](https://www.gadgetify.com/wp-content/plugins/wp-youtube-lyte/lyteCache.php?origThumbUrl=https%3A%2F%2Fi.ytimg.com%2Fvi%2Fpt5xnzvImdg%2F0.jpg)
7 Mindblowing Optical Illusion Toys 😵 Gadgetify
You can buy the STL file to print this optical illusion slide on Etsy.
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