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Author Topic: Explain this to me.  (Read 10731 times)
Fabricated
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on: June 27, 2007, 02:50:05 PM



Okay, she's spinning clockwise right? Slowly look from the bottom of the image up.

What kind of optical illusion is that?

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Chimpy
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Reply #1 on: June 27, 2007, 02:55:31 PM

Her boobs are unbalancing?

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schild
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Reply #2 on: June 27, 2007, 02:57:05 PM

Uh.

Jesus.

I thought it actually switched directions until it changed back and forth real fast when I blinked.
Engels
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Reply #3 on: June 27, 2007, 02:58:53 PM

Do you mean that for some moments she looks like she's spinning counter-clockwise? I noticed that at first, then I looked at it again and it seemed back to clockwise. Then I couldn't 'get' it to turn counter-clockwise. Now, when I hit 'reply' and start posting, its back to counter-clockwise! Arg!

I should get back to nature, too.  You know, like going to a shop for groceries instead of the computer.  Maybe a condo in the woods that doesn't even have a health club or restaurant attached.  Buy a car with only two cup holders or something. -Signe

I LIKE being bounced around by Tonkors. - Lantyssa

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Reply #4 on: June 27, 2007, 03:01:38 PM

I never see any rotation other than clockwise.

I noticed more how her foot goes up while the top of her body never changes vertical location.


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schild
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Reply #5 on: June 27, 2007, 03:02:34 PM



This is the position that it always switches for me.
Chimpy
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Reply #6 on: June 27, 2007, 03:22:39 PM

Maybe it is my years of working around spinning objects that has trained my eyes?

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Merusk
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Reply #7 on: June 27, 2007, 03:25:14 PM

It has to do with the foot shadow, if you can't get it to work, focus (but un-focus) your eye on the space between the foot and the shadow and then it'll flip.   (When I say unfocus, I mean like viewing one of those 3-d pictures)

Of course, now I can't get it to look anything BUT counter-clockwise.  I've broken my brain again.

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Chimpy
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Reply #8 on: June 27, 2007, 03:31:51 PM

It has to do with the foot shadow, if you can't get it to work, focus (but un-focus) your eye on the space between the foot and the shadow and then it'll flip.   (When I say unfocus, I mean like viewing one of those 3-d pictures)

Of course, now I can't get it to look anything BUT counter-clockwise.  I've broken my brain again.

I can never unfocus my vision enough to get those MagicEye things to work. I am like Willem in Mallrats.

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Samwise
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Reply #9 on: June 27, 2007, 03:43:28 PM

It has to do with the foot shadow.

Good eye.  Yeah, the trick is that without the shadow, you can't tell when the raised foot is pointing toward you or away from you, so you can interpret her as turning in either direction.  Once you're looking at the shadow, it's clear that she's turning counterclockwise.

I'm not sure why the initial tendency is to see her turning as clockwise, though.  Wonder if it's a handedness thing.  The thing that would make the illusion really devious would be to have a similarly subtle 3D cue above her that makes her appear to be turning clockwise, so that the direction would depend on which half of the image you were focused on.

Now that I understand the illusion, I can make her switch back and forth by covering up the shadow and focusing on her lowered foot.  It's small enough that it's easy to convince yourself that it's turning the other direction, and once you've convinced yourself of that you can look up at the rest of her and it'll stay that way.
Trippy
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Reply #10 on: June 27, 2007, 03:44:40 PM

I can never unfocus my vision enough to get those MagicEye things to work. I am like Willem in Mallrats.
It helps a lot if you are nearsighted. One trick is to focus on something further into the distance. E.g. look above the picture into the distance and the bottom of your view (i.e. the top of the picture) should unfocus itself.
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Reply #11 on: June 27, 2007, 03:47:26 PM

I thought you fuckers were high and then it switched on me. I am afraid.

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Reply #12 on: June 27, 2007, 04:02:09 PM

It's not the spin direction changing that's freaky -- it's the switching of the pivoting leg that is. It's the silhouetting that allows for the direction switching effect since as a silhouette you can't tell if something is pointing towards you or away from you. I'm not sure how the leg switching effect works but it's probably related.

Edit: typos
« Last Edit: June 27, 2007, 04:05:07 PM by Trippy »
RhyssaFireheart
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Reply #13 on: June 27, 2007, 04:04:51 PM

Ugh, I only see her as spinning counterclockwise, nothing else.  Even trying to block out the shadow and unfocusing the eyes, etc.. still just going counterclockwise to me.   Sad Panda

WayAbvPar
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Reply #14 on: June 27, 2007, 04:06:26 PM

Ugh, I only see her as spinning counterclockwise, nothing else.  Even trying to block out the shadow and unfocusing the eyes, etc.. still just going counterclockwise to me.   Sad Panda

Try staring just at the shadow for a bit, then quickly look up to about breast level (as a man, my eyes naturally rest there. YMMV  evil ). Wait 6 or 7 revolutions and then look up. When it 'pops' it will blow your mind.

When speaking of the MMOG industry, the glass may be half full, but it's full of urine. HaemishM

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Reply #15 on: June 27, 2007, 04:18:26 PM

schild marked one of the interesting frames where there's a clear ambiguity which way she's facing because of the silhouette effect. Look at her feet. They can either be pointing towards you or away from you and because of the way the legs looked crossed it allows your mind to pick either leg as the one she's standing on. If you can't "visualize" her switching legs (consciously or subconsciously) I don't think you can get her to switch directions.

Edit: I can get her to switch whenever she's in profile like so:



Again because of the silhouette it's ambiguous which leg she's standing on.

« Last Edit: June 27, 2007, 04:32:09 PM by Trippy »
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Reply #16 on: June 27, 2007, 04:36:35 PM

It has to do with the foot shadow.
Good eye.  Yeah, the trick is that without the shadow, you can't tell when the raised foot is pointing toward you or away from you, so you can interpret her as turning in either direction.  Once you're looking at the shadow, it's clear that she's turning counterclockwise.
I can get her to switch with or without the shadow. It's as ambiguous as the rest of her silhouetted shape. I.e. there's no "proper" direction for her to be spinning. It's like the vase/two faces illusion -- both interpretations are correct.
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Reply #17 on: June 27, 2007, 04:55:02 PM

Jesus, the second shadow switches from foot to hand depending on which way she's going. I need to get some acid and watch this.
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Reply #18 on: June 27, 2007, 05:00:13 PM

Jesus, the second shadow switches from foot to hand depending on which way she's going. I need to get some acid and watch this.
No it doesn't. I think you may be on acid already :-D
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Reply #19 on: June 27, 2007, 05:04:52 PM

Jesus, the second shadow switches from foot to hand depending on which way she's going. I need to get some acid and watch this.
No it doesn't. I think you may be on acid already :-D
I meant visually it switches. Not REALLY switches. Someone can back me up here... heh.
Nonentity
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Reply #20 on: June 27, 2007, 05:06:46 PM

Man, I can't MAKE IT HAPPEN.

She spins for eternity in counterclockwise.

But that Captain's salami tray was tight, yo. You plump for the roast pork loin, dogg?

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Trippy
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Reply #21 on: June 27, 2007, 05:16:10 PM

Man, I can't MAKE IT HAPPEN.

She spins for eternity in counterclockwise.
Trying watching for when she's in profile facing to the right like in my above image. Now imagine that she's spinning 180 degrees and then switching directions right when she's in the right facing profile position. Concentrate on the extended leg, try to ignore the pivoting leg. Also try covering up the feet shadow. I can make her spin back and forth if I think of her switching direction at each profile point (left and right).
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Reply #22 on: June 27, 2007, 05:19:25 PM

I tried watching her boobs, all I noticed was nipples.
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Reply #23 on: June 27, 2007, 05:22:20 PM

I have trouble making her switch when I'm staring at her breasts.
schild
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Reply #24 on: June 27, 2007, 05:27:37 PM

Fabricated was either idling in an IRC channel with 4channers or reads 4chan or reads some boring blogs. ^_^

Quote
I have trouble making her switch when I'm staring at her breasts.

That's funny, when I'm looking at them, I have trouble giving a shit whether she's spinning or not.
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Reply #25 on: June 27, 2007, 05:31:24 PM

Quote
I have trouble making her switch when I'm staring at her breasts.
That's funny, when I'm looking at them, I have trouble giving a shit whether she's spinning or not.
No no! Must make her spin back and forth!
bhodi
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Reply #26 on: June 27, 2007, 05:42:55 PM

Clockwise only :(
Signe
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Reply #27 on: June 27, 2007, 05:50:18 PM

That's a fun one and I've not seen it before.

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Reply #28 on: June 27, 2007, 05:53:38 PM

That's a fun one and I've not seen it before.

Rant at Schild:  I THOUGH WE WEREN'T ALLOWED TO HAVE NIPPLES!!!

Wouldn't that make breast feeding difficult?

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Reply #29 on: June 27, 2007, 05:55:16 PM

OK, there is a way to tell perspective, look at the head during rotation, you can see it dip and rise, it does actually move in an oval. On the 'bottom' of the oval, she's facing away from me, pony tail towards. That's probably what I saw.
Engels
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Reply #30 on: June 27, 2007, 05:56:07 PM

Zombies don't need to breast feed. Zombie babies that is. If Signe were to have undead babies.

I should get back to nature, too.  You know, like going to a shop for groceries instead of the computer.  Maybe a condo in the woods that doesn't even have a health club or restaurant attached.  Buy a car with only two cup holders or something. -Signe

I LIKE being bounced around by Tonkors. - Lantyssa

Babies shooting themselves in the head is the state bird of West Virginia. - schild
Chimpy
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Reply #31 on: June 27, 2007, 05:56:20 PM

OK I GOT IT TO TURN COUNTERCLOCKWISE!

I had to block off the shadow at the bottom and force myself to look at her knees.


The shape of her planted foot locks me into her being clockwise if I see any shadow.

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Selby
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Reply #32 on: June 27, 2007, 08:32:24 PM

I can never unfocus my vision enough to get those MagicEye things to work. I am like Willem in Mallrats.
I feel like there is a giant conspiracy of everyone talking about how she's spinning counterclockwise when dammit she's just spinning clockwise.  I see nothing special or out of the ordinary and had no one have said anything I would never have given it a second glance.  Damn bastards...
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Reply #33 on: June 27, 2007, 08:35:39 PM

Wow the "leading" arm switches just like the pivoting leg. This thing is way freaky.
schild
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Reply #34 on: June 28, 2007, 03:42:59 AM

Wow the "leading" arm switches just like the pivoting leg. This thing is way freaky.

So does the un-pivoted shadow! You bastard! Mob
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