12/14/2023 0 Comments Black and white spiral illusion![]() I then scaled these measurements and marked them 90 degrees away on the outer part of the circle. I put a ruler along a radial, and measured the thickness and position of each middle arm that it crossed. I measured the remaining width of cardboard between the ends of the middle arms and the edge, and tried to draw them proportionally to the middle arms. Not only did I have no chance of getting a full picture of the outer arms, I also couldn't conceive of creating a stencil that large. This was the toughest part of the project. The fourth arm was made opposite that, and there you have it. Once I had two spirals opposite eachother, I measured 90 degrees away from the line connecting their farthest points, and made a third point the same distance from the center. All I had to do was make sure that that dot was visible inside the stencil along with the center point, and I was set. I took a straightedge and measured from the center hole to the very outer edge of the arm, then made a mark that far away from the center exactly opposite. It's crucial at this point to ensure that the arms will be equally spaced around the circle. The resulting stencil was stuck on the circle (I made sure to center it on that little hole made by the tack when I first drew it) and painted black. I then carefully cut out the shape with my trusty knife. I cut out the arm, and traced it onto a piece of stiff paper (I used some spam coupon). I took a screenshot of the video, then printed out the part of it that contained one full inner arm. I'm sure you could design your own spiral in photoshop or something, but I wanted a tried-and-true spiral. I looked around on youtube until I found a sufficiently powerful spiral design, and decided to recreate it. Now begins most time-consuming part of the process. You can download them and print them yourself. I actually can't find the original video I used on youtube anymore, so instead I've uploaded the images I used to make my stencils onto imgur here. Photo-editing software (mspaint is fine!)Ĭlear plastic tubing (optional but recommended) Large sheet of cardboard/thin plywood (I was lucky enough to have a big tv box)Īcrylic paints (black and white are probably best, but I'm sure other colors would work too) Here's what you'll need to make your own! I decided to make a real-life motorized LSD spiral that I could hang on my wall and enjoy whenever I wanted to. You get a very noticeable bubbling and bulging of your surroundings, which is said to be similar to the effects of hallucinogenic drugs.īeing a neuroscience major, I'm fascinated by these sorts of things. It's somewhat similar to color-based after-images, but higher-level. The result of this is quite impressive - when you look away, your brain will be biased towards the opposite direction of motion. If you stare at its center for a while as it spins, you will 'get used to' the motion - the parts of your brain that respond to it slow their firing rate. Because of the reversals in the LSD Spiral, when spun it creates neighboring areas of opposing motion. When a spiral spins, it gives the impression of expansion or contraction depending on which way it's going. It's simply a spiral that reverses its directionality a few times. ![]() The "LSD Spiral" is one of the most powerful illusions I have ever encountered.
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