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Penrose Cube Illusion

by chylld, published

Penrose Cube Illusion by chylld Feb 20, 2011

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Summary

This is an extrapolation of the now infamous Penrose Triangle illusion 3D model (http://www.thingiverse.com/thing:6513). If you had trouble getting your head around that one, you're not going to find this one any easier! :)

Where the triangle used 9 cubes, this arrangement uses 31 cubes to make a larger sorta-notreally-cube.

All versions are parallax-corrected for a viewing distance of 40cm.
(the larger ones are not simply scaled up versions of the smaller ones)

Instructions

pcube10.stl is the 10cm version, measuring 98.32 x 98.41 x 15.14 mm.
pcube15.stl is the 15cm version, measuring 148.03 x 148.15 x 22.03 mm.
pcube20.stl is the 20cm version, measuring 197.39 x 196.83 x 28.77 mm.

(NEW) pcube15_braced.stl is the 15cm version with some bracing between the blocks to help them stay upright in the first half of the print.
(NEW) pcube20_braced.stl is the 20cm version with bracing.

The bigger you can print, the better... however as the photos show, even the 10cm version shows the effect very well!

No support required.

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can I get an iges file of this? I want to make one on the 5 axis cnc out of brass.

Sorry I don't have software that can export to IGES. Hopefully you can find one that understands both STL and IGES formats.

it is very hard to do but i will try.

the illusion even works on my pc screen whoa...

Just finished printing a 15cm version and uploaded a photo of it. Very hefty!

Nice, But now lets see you make a Penrose/Schwanitz/Wong Buckyball....

enough Penrose for now... ;)

that is really cool. You should patent that.

lol, too soon?

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