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Optical Illusion Pen Holder – Round or Square?
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Optical Illusion Pen Holder – Round or Square?
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Model information
- Source
- Printables
- Category
- Office
- License
- Creative Commons — Attribution
This pen holder is based on the fascinating work of Kokichi Sugihara, known for his mind-bending optical illusions, and inspired by the original STL model from Dandy Cat Lab.
I remixed their design to create this functional version: depending on the viewing angle, the holder appears either perfectly round or perfectly square.
It’s not just a pen holder – it’s also a fun conversation piece for your desk!
🔹 Remix of the base model by Dandy Cat Lab
🔹 Optical illusion concept by Kokichi Sugihara
🔹 Printed version adapted as a practical pen holder
Download it, print it, and enjoy the surprise effect when you turn it around.
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