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3-D Optical Illusions

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Alan H
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Re: 3-D Optical Illusions

#61 Post by Alan H » July 31st, 2012, 3:07 pm

Latest post of the previous page:

Both circles are well, circles, apparently...
Alan Henness

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Dave B
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Re: 3-D Optical Illusions

#62 Post by Dave B » July 31st, 2012, 4:26 pm

That does weird things to one's perception - ugh!
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Tetenterre
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Re: 3-D Optical Illusions

#63 Post by Tetenterre » November 4th, 2012, 9:38 am

faceturn.jpg
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Stare at this pic carefully and you will see this man turn his face.
Steve

Quantum Theory: The branch of science with which people who know absolutely sod all about quantum theory can explain anything.

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Alan H
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Re: 3-D Optical Illusions

#64 Post by Alan H » November 4th, 2012, 11:31 am

Excellent!
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There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
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Dave B
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Re: 3-D Optical Illusions

#65 Post by Dave B » November 4th, 2012, 12:26 pm

Good, but what happened to the end of his nose in the sideways "view" I wonder? Is it some sort of computer pointer getting in on the act?
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jaywhat
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Re: 3-D Optical Illusions

#66 Post by jaywhat » November 7th, 2012, 9:50 am

Didn't have to look carefully. It was strangely two people at the same time. Now I need to lie down. :smile:

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Dave B
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Re: 3-D Optical Illusions

#67 Post by Dave B » November 7th, 2012, 1:48 pm

jaywhat wrote:Didn't have to look carefully. It was strangely two people at the same time. Now I need to lie down. :smile:
That's like the silhouette of, either, one chalice or two faces, look long enough and it changes back and forth . . . and makes one feel queezy!
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Fia
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Re: 3-D Optical Illusions

#68 Post by Fia » December 5th, 2012, 9:07 pm

Image

Although mightily impressive, I don't think any benefit would last for long, unless in many places and constantly changing characters. Testosterone fuelled youngsters would detour by them to give female passengers a fright.

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Dave B
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Re: 3-D Optical Illusions

#69 Post by Dave B » December 5th, 2012, 9:36 pm

It takes a special kind of brain to work out the required distortions in the artwork for this kind of thing. (Assuming no optical equipment is used to project the images of course!)
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Alan H
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Re: 3-D Optical Illusions

#70 Post by Alan H » December 6th, 2013, 1:11 pm

The two surfaces look to be different shades - until you place your finger over the join...
2013-12-06_13h08_56.png
2013-12-06_13h08_56.png (148.15 KiB) Viewed 3210 times
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
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Re: 3-D Optical Illusions

#71 Post by Dave B » December 6th, 2013, 1:36 pm

Strange, there seems to be a short time delay for me before the shades look the same.

Like the man said on The Infinite Monkey Show, the larger part of what you think you see is supplied by the brain, not your eyes.
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Alan H
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Re: 3-D Optical Illusions

#72 Post by Alan H » December 21st, 2014, 11:43 am

This is four concentric circles...
Screenshot from 2014-12-21.png
Screenshot from 2014-12-21.png (47.05 KiB) Viewed 3109 times
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Tetenterre
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Re: 3-D Optical Illusions

#73 Post by Tetenterre » December 21st, 2014, 11:55 am

The crosses are the same colour.
YellowX.jpg
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Steve

Quantum Theory: The branch of science with which people who know absolutely sod all about quantum theory can explain anything.

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Dave B
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Re: 3-D Optical Illusions

#74 Post by Dave B » December 21st, 2014, 12:53 pm

Interesting...
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Alan H
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Re: 3-D Optical Illusions

#75 Post by Alan H » December 21st, 2014, 2:08 pm

Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
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Re: 3-D Optical Illusions

#76 Post by Dave B » December 21st, 2014, 3:44 pm

Bit like the ping pong ball on the fountain ?

Do not try with a gas cooker!!!
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Tetenterre
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Re: 3-D Optical Illusions

#77 Post by Tetenterre » December 22nd, 2014, 12:17 pm

Hah! Well, that was interesting and nicely serendipitous:

Try this with the YouTube clip Alan just posted: stare at the centre while it plays for about 20 seconds, then pause it. What (if anything) do you notice?
Steve

Quantum Theory: The branch of science with which people who know absolutely sod all about quantum theory can explain anything.

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Dave B
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Re: 3-D Optical Illusions

#78 Post by Dave B » December 22nd, 2014, 5:05 pm

Hah! Brain gap again in my last post - I had gone from the rotating rings and viewed a clip of a paper plane flying round in circles over the rings of an electric cooker. Forgot that no-one else had seen that!

It's me age y'know.
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Alan H
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Re: 3-D Optical Illusions

#79 Post by Alan H » December 22nd, 2014, 5:52 pm

Dave B wrote:It's me age y'know.
We know, we know... :D
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Alan H
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Joined: July 3rd, 2007, 10:26 pm

Re: 3-D Optical Illusions

#80 Post by Alan H » February 12th, 2015, 12:50 pm

Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
Posts: 17809
Joined: May 17th, 2010, 9:15 pm

Re: 3-D Optical Illusions

#81 Post by Dave B » February 12th, 2015, 2:50 pm

Very clever!
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
Me, 2015

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