I honestly believe that the 3-D model is spinning clockwise, but due to differing perceptions, people may see it differently.

My guess, is that because the 3D model is monochromed, to the eye, ti can completely loose all 3d shape. The brain, attempts to perceive it as 3D because it is moving. The monochrome nature allows the mind to flip it, like a negative, so the leg that is left becomes right, and so on, and you're seeing through the body (the 3d clockwise one) to see the inverse form. except, i cant make my eye do it.

Can someone who can see it go AC, confirm if my theory above, on how the AC spin appears is correct? or is it bumpkus, in which case, how DOES it appear, when going ac, if that question dosent sound like trying to describe a circle (its round)

DAMNIT when i pause the youtube one (cant pause SG's) I can get my mind to flip the legs, so left becomes right, and right becomes left. But the instant i hit play to see it continue to mvoe that way, the legs jump back. Bah.

Ok, MG, try this. Looking at you frame screen shots, imagine that the leg that ir raised, is at the back (far away form you) in the top left image. Now, going Left to right, image that leg is getting nearer to the front, passing in front, and then receding. That would allow it to be spinning ac.

I can do this for individual frames, but not animated. For instance, bottom left, the dancer is really leaning back, the right foot is on the floor, toes in front in the air.

Now ive got the whole bottom row going AC. top row, to get that AC, you need to see that the middle shot is her BACK, not her front, its her top left shoulder, from the back, in the top left corner.

Now, if i can string the ac anim from the still frames, to try and get it animating on SG's.

Nope, still cant get the anim to flip. But now i understand how it does.

I can't do it. Look at the picture of the back. Her right leg is clearly in the air, and in the next frame, it's even closer to the viewer.

Left legs in the air if AC, right leg, if Clockwhise. Left leg is in the air, and to the front, toes pointing at you, then, left leg in the air, sdie on, in the enxt shot.

Oh, the pic labeled Back (the one i was referring too too) if shes spinning AC, its her front, with her shoulder WAY back, left shoulder really far back.

Still cant get it to spin AC though, just be that way in still frames.

Gunrock: Look at the images you posted (it's probably a lot easier to do with the still images) and flip your descriptions so that the back is the front - i.e. in the z axis. Consequently, left becomes right. When trying to flip it watching the animated version, I found it easier with the link Swampgirl posted:
http://www.news.com.au/perthnow/story/0,21598,22492511-5005375,00.html

If it helps, look at your "front facing her right" image, and imagine the camera position being slightly vertically lower.

That's the best description I can give of how I flip it. Hope it helps.

proof that she's going anti-clockwise :

http://i216.photobucket.com/albums/cc59/flogger_bucket/Frames-2.jpg

(that's a bugmenot account so don't blame me if someone eventually replaces it with a picture of a cock)

OK, renaming the images, for the view of her if shes going AC>

Top Left == BACK
Top Middle, == Back, Left side swinging towards the viewer.
Top Right == Profile, left side, but LEFT leg in the air.
Bottom Left == Front, Left leg in air, toes of both legs pointing at viewer.
Bottom Middle == Right side, Left leg in air at back.
Bottom Right == Back, left leg, in air, crossing infront of the right leg.

Oh, and her head is leaning over her left shoulder in every shot.

Aye, see gorillamans pics, lol. Didn't see his post as i was adding mine.

I can see the still frames as counter-clockwise, MG. Weird huh? Perception still rules.

I think that there's only one way to solve this: Ask the maker of the 3-D model which way it's actually spinning In the frames that GM changed the name of, I can force myself to see how it goes with the name. But when I watch the video, I can not force myself to see it go counter-clockwise.

if you imagine your eye level is above her feet, she spins one way, if your eye level is below her feet, she spins the other.

Comment hidden because you are ignoring dag. (show it anyway)

I found that placing splayed fingers over the rotating image can cause a direction change. It changes for everyone here. Including 6 yo son.

Nope. I still can't do it.

Switching eyes back and forth works quickly for me. And it does so possibly because I thought it would. So if you believe looking at it upside down, tapping the the opposite side of your head while you twitch the opposite buttock you would make it turn..it probably would.

Good nght

MG, i'm with you. I can force myself to see some of the stillframes as counter-clockwise, but i'm going batty looking at the animated one. i think that if i eventually see her slow down and spin the other way it will have signalled some sort of irreparable brain rift...

blah de blah... all this shows is you have no idea what's in the world, you only know what your brain told you it saw. that to me is far more fascinating.

Agreeance with Mink.

All experience is subjective - there is no objective reality.

I did it.
It took me about a minute to two, but I tried paying attention to her reflected "left" foot and then perceiving that her toes were facing away from me, not towards. Her reflection started going counter-clockwise, then in my head I went "Holy crap!" and her whole body began to rotate counter-clockwise.

I'm confused by people saying this is a 3d model -- it's a silhouette.

If we were able to see a shaded or textured 3d model, we'd know for sure which way she was spinning, because we'd be able to know at which point during her spin we're seeing her front and her back.

It is kinda cool that our brains will unconsciously make a decision to classify the silhouette as a shapely woman who's spinning like a dancer from such poor visual input. It will even give us a feeling that we know which direction she's rotating.

We should all be worried about the possibility that our brains do this in the same sort of way for other things.

NetRunner, How are you confused about the fact that this silhouette was generated by a 3d model of a dancer spinning? The shadow below her gives this fact away. It would be very difficult to create an accompanying shadow to the silhouette if not using a 3d model. They simply did not light the model, and this is what produces the illusory effect. They did light the rest of the environment, however, to make it clear which way she is moving.

MarineGunrock, you have it backwards. Do not pay close attention to the model. Instead, follow the shadow underneath the dancer, which is lit, and therefore gives away depth information. When the shadow of the raised foot appears, that foot must be behind the dancer. If the shadow appeared when the dancer's raised foot was in front, then the light would be in front of the dancer, so the shadow would be behind her, and would not be visible in the image at all.

The real mystery is why this image appears to spin clockwise at all. I can see it, but I don't know how.

*quality

Awarding MarineGunrock with one star point for this contribution to VideoSift - declared quality by UsesProzac.