Eureka puzzle

Yes perhaps. I'm still having trouble working it out, but you can definitely see something fishy in the thread of the left nut, in that second link from my last post. At its uppermost (the thread), it disappears a little too quickly, I think. My perspective seems to want it to continue around just a little further. It makes it seem (as you said) that there is nothing solid behind it and it's just a flat piece of card or something.Are you thinking that it is completely flat and purely a two dimensional illusion of depth, or a flat nut (or nuts) with inverted edges, threads, etc? Something in between, perhaps? At this point I'm not sure which it is but I would imagine it's along these lines.

Hi Tony650,I can see the illusion in the picture at the bottom of the page in this link that you previously posted:http://www.thenakedpcstore.com/planb/illusionsIf you notice, in the "paradox box" higher up, the box is inverted. If you look just right you'll see that you're looking at the inside of a 3 sided "box" and that the "corner" of the box that appears to be closest to you is actually farthest away. Then you can see that the rod simply goes straight through the inside of this partial box.Likewise, the left nut in the bottom photo is inverted. If you look just right at what appears to be the three outside flanges of the nut, you will see that these are actually three upright walls attached to a flat hexagonal piece. IOW, the three edges of this nut which appear to be closest to you are actually the farthest away. The flat hexagonal piece which appears to be edge on to the man is actually flat on to him. He is seeing the bottom side of the flat hexagonal and you are seeing the top side with the three upright walls (flanges) attached and sticking upward. The odd looking thread piece that you remarked on is simply a partial piece attached to the bottom side of the flat hexagonal (the side facing the man).Then to allow the rod to go straight through the right nut, you can notice that what appears to be the inside thread piece, is actually a curved piece or a sort of a hood which is curving outward away from the flat hexagonal of the right hand nut.Other than utilizing flat hexagonal pieces to provide the appearance of shape, these objects are not "nut" shaped at all. They are simply flat hexagonal pieces with upright flanges (walls) on the left and an outward (toward you) hood like piece on the right.Squint just right and you will see it.Namaste'Amlodhi[This message has been edited by Amlodhi, 02-02-2004][This message has been edited by Amlodhi, 02-02-2004]

Hi Amlodhi! Heh heh, as a matter of fact I picked that one right away. I'm uncertain why, but for some reason I was more or less unable to see the box the way I was supposed to see it, from the moment I first looked at it. Weird huh?And yes, your explanation of the nuts is basically what I was thinking. I figured they were probably inverted in a way similar to what you described. Whatever it was, I knew I was never looking at solid, three dimensional nuts.My problem wasn't really figuring out where things needed to be (approximately) in order to allow the bar through. What I was having trouble with was nutting out (pun intended) the actual configuration of the illusion as a whole.However, your explanation has really cleared it up for me. One of the things I was having a difficult time working out was what the performer sees from his position. Well you explained it beautifully! Thank you!Incidentally, you seem to know a bit about this. Are you familiar with these kinds of illusions? Personally, I love them. If you know of any other good ones online I'd love to see them. If you don't that's fine though. Don't go to any trouble for me, just if you happen to know of any off the top of your head.Thanks again for your help Amlodhi! I really appreciate it!