Reversing Ring
Reversing Ring — 2026, generated SVG, dimensions variable · Rotation · Moving
After Hans Wallach / D. N. O'Connell, 1953
Can you flip the way it spins?
Can you flip the way this ring is turning?
How to look: Imagine the dots along the top of the ring are near.
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Reveal the answer
Yes. It reads as seen from above or below, and each reading spins the other way.
↑ Same drawing; only the dots read as near (large orange) differ. Left: the lower side is near and moves right. Right: the upper side is near and moves left. Treat the orange dots of the reading you are not seeing as near, and the spin flips.
Notes — why it looks that way
What is happening
A ring of dots turns slowly around a vertical axis. Every dot has the same size and brightness, so nothing in the picture says which dots are passing in front.
That is why the picture has two readings:
- You are looking down on the ring, and the near dots (the lower side) move right
- You are looking up at the ring, and the near dots (the upper side) move left
Either way, the dots on the screen move in exactly the same way. Neither reading is the true one.
How to flip it
It helps to open “Reveal the answer” first. The two pictures there are the same drawing. Only the dots read as near (large orange) are different.
- Check which reading you have now. If the lower side looks near, you are looking down. If the upper side looks near, you are looking up
- Assume the other reading. If the lower side looks near, follow only the dots on the upper side and tell yourself: “these are the near ones”
- Keep watching. When the dots you were following start to look near, it has flipped, and the direction of the spin flips with it
If it does not work, watch just one of the two rings. Setting “Speed” below the work to 0.5×, or looking away and back again, also helps.
Why it can be flipped
When the brain sees a picture that fits two readings, it picks one and holds it steady. But nothing in the picture supports that choice, so simply assuming the other reading is enough to switch. Sometimes it even flips on its own while you watch. It is the same mechanism as the Necker cube.
The reverse is also true. Make the near dots larger and only one reading is left. That is why, in the answer, you can only see the reading where the large dots are in front.
You can try the same mechanism with Spinning Point Clouds and Spinning Wireframes.
Using it on social
A single question, “Which way did it spin for you, and can you reverse it?”, is enough to start a conversation. The generator exports the still frame from the same function, so the still version works as a cover image where video cannot be used.
First described
After Hans Wallach / D. N. O'Connell, 1953
Source: "The kinetic depth effect", Journal of Experimental Psychology
A silhouette of a rotating solid carries no depth cues, so it can be read two ways.
Media — images and data
- OG / X (1200×630)
- Instagram square (1080×1080)
- Shorts / Reels vertical (1080×1920)
- Answer image — landscape (X)
- Answer image — square (Instagram)
- Answer image — vertical (Shorts)
- Post drafts (JSON)
Free to use for non-commercial purposes such as classes, school projects and blogs, with a link back to this page as the credit. Commercial use is not covered
Every figure is generated here from the phenomenon itself (original design). The general principle of rotational-direction ambiguity from orthographic projection (the ambiguity of structure-from-motion) is implemented here from scratch as a ring of dots. It is not a copy of any existing silhouette work.