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 Post subject: Optical Illusions and impossible objects!
PostPosted: Sat Aug 28, 2010 7:52 am 
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Hey guys,

I like optical illusions and paradoxes, and I though of making maybe one of two paradoxical objects in 3D (or at least an illusion of the objects)

I've uploaded the Penrose Staircase on shapeways. I'm not sure I'll be prototyping it, knowing that I bought three of my puzzles yesterday and today, so I'm short in cash, but I don't think it really needs prototyping of course.

You can see the 3D simulation in this link.

Here is the result, when you watch it from a certain point of view (picture)

Enjoy!

- Greg :D


Attachments:
Penrose Staircase.JPG
Penrose Staircase.JPG [ 17.9 KiB | Viewed 6741 times ]

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Last edited by RubixFreakGreg on Tue Aug 31, 2010 6:08 am, edited 1 time in total.
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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sat Aug 28, 2010 9:12 am 
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Now this is some good stuff! You really need to know and understand the way
it looks in higher than three dimensions, and then realise how it will become
an illusion in two dimensions. And then, you print it as a three dimensional object!

Excellent!

:)


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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sat Aug 28, 2010 9:30 am 
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Thanks a lot!!

- Greg :D

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sat Aug 28, 2010 9:56 am 
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Very cool! The only possible problem I see is that most 3d design programs don't take parallax into account while in "design mode" this means that two parallel line will never touch, when in reality they appear to merge into a vanising point. Because this object relies on a certain viewing angle to create the illusion, I would check to make sure everything is perfect before you go out and order one. If this works out well, I may order one, because its pretty cool! Now go make some Other impossible objects like the impossible triangle and Escher's house!

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 Post subject: Re: Penrose Triangle!!
PostPosted: Sat Aug 28, 2010 10:19 am 
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Here's the Penrose Triangle!

I like Penrose :lol:

This one is a bit bigger and therefore costs more: 13.3cmx10cmx10cm = 22.42$ :)

- Greg :mrgreen:

EDIT: What were you saying Eric? xD

EDIT 2: My Design software actually does work with Perspective, so the illusion is true :)


Attachments:
DiffAngle.JPG
DiffAngle.JPG [ 25.39 KiB | Viewed 6668 times ]
Penrose Triangle.JPG
Penrose Triangle.JPG [ 11.76 KiB | Viewed 6670 times ]

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 Post subject: Window Paradox Illusion (Shapeways)
PostPosted: Sat Aug 28, 2010 11:02 am 
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This is my version of the Window Paradox!

Enjoy!

- Greg :D


Attachments:
Window Paradox.JPG
Window Paradox.JPG [ 39.14 KiB | Viewed 6650 times ]

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sat Aug 28, 2010 12:19 pm 
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You should look into the guy who figured out how to actually make some of these (especially the penrose triangle) a much different way. I can't remember the video or link, but google something about "impossible geometries solved" or something like that.

They wrote a program that takes drawings and turns them into 3d models (pretty neat, right?) and then fed it impossible geometries to test it, and were surprised when it came up with solutions for some of them.

I'll look for it now.

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sat Aug 28, 2010 12:58 pm 
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You mean the guy who made this?

From a certain angle it looks like the penrose triangle

I'm not sure but I believe it's Escher

- Greg :)

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sat Aug 28, 2010 6:04 pm 
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No, it's made by NOT using 90 degree angles.

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sun Aug 29, 2010 3:44 am 
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This version?

If I'm still mistaken can you find what you're trying to explain because I dont exactly understand, but here there is no 90 degreee turn!

- Greg :)

P.S: I got the stl files for both versions

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sun Aug 29, 2010 4:08 am 
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Sounds like theVDude may be thinking of the work of the Japanese mathematician Kokichi Sugihara on illusions of non-rectangularity which I linked to in this post. :wink:

Here is a link to a video describing his work on creating "impossible" 3D solids:
http://gcoe.mims.meiji.ac.jp/jpn/movie/impossible/index.html


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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sun Aug 29, 2010 4:17 am 
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Wow thanks a lot!!!

Lol I made all two versions of the triangle that are shown on the video :)

But now there are more optical illusions I cam make! thanks!!

- Greg :)

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sun Aug 29, 2010 9:14 am 
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Klara wrote:
Sounds like theVDude may be thinking of the work of the Japanese mathematician Kokichi Sugihara on illusions of non-rectangularity which I linked to in this post. :wink:

Here is a link to a video describing his work on creating "impossible" 3D solids:
http://gcoe.mims.meiji.ac.jp/jpn/movie/impossible/index.html

Thanks, I thought I was going crazy for a minute.

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Sun Aug 29, 2010 8:17 pm 
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good thread :o

try this puzzle set...
Image

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Mon Aug 30, 2010 12:50 am 
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grigr wrote:
try this puzzle set...]


Our friend Leonid has done that and more!

http://www.puzzlemochalovlp.com/

:D


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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Mon Aug 30, 2010 3:53 am 
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Nice!!!

Did any of you see that rubik's illusion poster before?

- Greg

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Mon Aug 30, 2010 4:29 am 
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ok, we will need to create two new topics to accommodate all the above:

1. Optical Illusions.
2. Impossible Objects.

Of course, sometimes those two topics can be considering the same subject at the same time!!!

:)


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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Tue Aug 31, 2010 3:26 am 
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Well tehnically, I make 3D illusions of mpossible solids, so is it one or two topics? :lol:

If anyone has other cool impossible figures that they kow about, can you please share them?

Thanks!

- Greg :)

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Tue Aug 31, 2010 3:44 am 
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You could change the topic of your post to "Impossible Objects and Optical Illusions".

Here is my contribution so far (which demonstrates my home's hydraulic system):

Attachment:
impossible_pipes.jpg
impossible_pipes.jpg [ 15.12 KiB | Viewed 6294 times ]


:lol: :lol: :lol:


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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Tue Aug 31, 2010 6:12 am 
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kastellorizo wrote:
You could change the topic of your post to "Impossible Objects and Optical Illusions".


Done!

I like your way to make water flow constantly :lol: although If I model it it won't be considered an impossible oject (or did I miss something?)

I think I might upload more Penrose triangles (but this time full triangles)

- Greg :)

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 Post subject: Re: Penrose Staircase on Shapeways!
PostPosted: Tue Aug 31, 2010 7:24 am 
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RubixFreakGreg wrote:
although If I model it it won't be considered an impossible oject (or did I miss something?)

Of course, that's not supposed to be one solid piece, it's 4 elbow joints for pipes.

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 Post subject: Re: Optical Illusions and impossible objects!
PostPosted: Tue Aug 31, 2010 11:28 am 
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I was always a fan of this stuff:
http://www.impossibottle.co.uk/bob.html


Attachments:
File comment: Edited to include the photo
bob1big.jpg
bob1big.jpg [ 10.2 KiB | Viewed 6189 times ]


Last edited by TBTTyler on Tue Aug 31, 2010 12:32 pm, edited 1 time in total.
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 Post subject: Re: Optical Illusions and impossible objects!
PostPosted: Tue Aug 31, 2010 11:57 am 
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TBTTyler wrote:
I was always a fan of this stuff:
http://www.impossibottle.co.uk/bob.html


How did he do that? xD

This is hard to understand, wow!

- Greg

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 Post subject: Re: Optical Illusions and impossible objects!
PostPosted: Tue Aug 31, 2010 12:20 pm 
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This site also has some pretty interesting stuff, and a few of them with real-life objects :D

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 Post subject: Re: Optical Illusions and impossible objects!
PostPosted: Tue Aug 31, 2010 4:10 pm 
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Oh man, I really want to know how a deck of cards with the cellophane still on went into a jar... or how a 1 piece arrow can go through a nut, if I could figure that out, I could probably do anything.

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 Post subject: Re: Optical Illusions and impossible objects!
PostPosted: Tue Aug 31, 2010 6:11 pm 
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For a little while, I was involved in the making of several impossible bottles. They included tennis balls, packs of crayons and cards, pieces of wood/card decks with screws planted firmly in them, pairs of scissors, and knots. I tried a Rubik's Cube but found it a bit tricky to do in a wine bottle. Photos of some of my examples can be found here.

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 Post subject: Re: Optical Illusions and impossible objects!
PostPosted: Tue Aug 31, 2010 7:06 pm 
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TBTTyler wrote:
I was always a fan of this stuff:
http://www.impossibottle.co.uk/bob.html
I think I know how it's done. Here's a video of something similar.

Spoiler Alert: http://www.youtube.com/watch?v=fEATei2wewY

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