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Checker Shadow Illusion


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#1 john

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Posted 06 October 2004 - 04:55 PM

Posted Image

Description
The image shows how the human eye doesn't always show the reality. The object casting a shadow in the image shows as if the shadow itself has a different shade of grey than the grey outside the shadow; however, in reality they are the same exact shade of grey. To prove this to yourself, copy the image to any paint program and then cut the two squares marked A and B. If you align the two sqaures beside each other you will notice that they are exactly the same color. Enjoy!

#2 NomadRock

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Posted 06 October 2004 - 05:19 PM

Ok, I admit, I had to check myself to be sure. That is pretty amazing
Jesse Coyle

#3 Mihail121

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Posted 06 October 2004 - 05:47 PM

holy son of a gun... human eye sucks..

#4 NeZbiE

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Posted 06 October 2004 - 06:48 PM

I've seen this one before, and this truly is one of the most effective ones I have ever seen.

To be quite honest, I had to open it in photoshop and check the rgb values just to make sure I wasn't dreaming =)

#5 davepermen

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Posted 06 October 2004 - 07:26 PM

i like it. takes some time till you can really see it.. and you have to be tierd.. :D as i always am.
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-Loving a Person is having the wish to see this Person happy, no matter what that means to yourself.
-No matter what it means to myself....

#6 anubis

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Posted 06 October 2004 - 08:16 PM

optical illusions are fun but why is this a "dev shapshot?" this could have been posted in the lounge :)
anyway... the thing itself is interesting
If Prolog is the answer, what is the question ?

#7 phantom

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Posted 07 October 2004 - 05:49 AM

Hm first thing I noticed is that it's an orthagonal projection. Why is there no real perspective?

#8 NomadRock

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Posted 07 October 2004 - 07:23 AM

It seems to not have been made with a 3d renderer. It looks like it was made with simple 2d shapes and gradient shading. This allows for them to ensure that colors are the exact shade they want them.
Jesse Coyle

#9 davepermen

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Posted 07 October 2004 - 10:02 AM

anubis said:

optical illusions are fun but why is this a "dev shapshot?" this could have been posted in the lounge :)
anyway... the thing itself is interesting

View Post


i haven't accepted it. isn't my fault :D

but yes i love this pic :D
davepermen.net
-Loving a Person is having the wish to see this Person happy, no matter what that means to yourself.
-No matter what it means to myself....

#10 knackered3

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Posted 07 October 2004 - 06:30 PM

I don't understand - why aren't there more snapshots?
The same 5 or 6 have been doing the rounds for about a month now.
Boring...

#11 baldurk

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Posted 07 October 2004 - 07:53 PM

knackered3 said:

I don't understand - why aren't there more snapshots?
The same 5 or 6 have been doing the rounds for about a month now.
Boring...

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there are currently 8 snapshots in the archives. The only way to get more is for more people to submit more snapshots.
baldurk
He who knows not and knows that he knows not is ignorant. Teach him.
He who knows not and knows not that he knows not is a fool. Shun him.

#12 knackered3

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Posted 08 October 2004 - 07:52 AM

so the problem is a lack of contributions?
Oh dear, that doesn't sound very promising....flipcode never had that problem.

#13 davepermen

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Posted 08 October 2004 - 11:45 AM

you don't know flipcode from the start, knackered. they started the same way.
davepermen.net
-Loving a Person is having the wish to see this Person happy, no matter what that means to yourself.
-No matter what it means to myself....

#14 Nick

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Posted 08 October 2004 - 12:17 PM

knackered3 said:

so the problem is a lack of contributions?
Oh dear, that doesn't sound very promising....flipcode never had that problem.
Submit one yourself. Right now. Doesn't matter what you're working on, we want to see it. :tongue: Oh and tell you closest friends to do the same...

By the way, it's online now for just a few weeks. Considering that I think it's not doing badly...

#15 john

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Posted 08 October 2004 - 01:53 PM

knackered3, it's pretty stupid to say there's not enough snapshots when you know for a fact that it depends on user submissions.
Why ask for more, when you yourself can't contribute anything. Can't you for once say something positive?

#16 anubis

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Posted 09 October 2004 - 07:43 AM

yeah knackered3, who are you ? the grinch ?
If Prolog is the answer, what is the question ?

#17 fyhuang

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Posted 13 October 2004 - 07:23 PM

Let's not gang up on people :).

My dev snapshots are single color renderings of walls and non-billboarded particle systems ;). I've seen this before in some other places, but this one is the most convincing. If it's not 3D rendered, then I commend you on your art skills :).
- FYHuang
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