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I've seen the reverse phi illusion effect crop up a few times in various places. [0] But as the paper says, it typically involved changing the luminance of the

I've seen the reverse phi illusion effect crop up a few times in various places. [0] But as the paper says, it typically involved changing the luminance of the foreground object. It's cool to get a breakdown of exactly what makes this effect tick. Are there any other good non-static optical illusions such as this? As in illusions which require some element that changes over time cyclically in order to produce the effect? [0] https://michaelbach.de/ot/mot-reversePhi/index.html https://michaelbach.de/ot/mot-reversePhi/index.html

zawerf 7y ago
There is a large collection of gifs based on the reverse phi illusion in a tiny obscure subreddit that I unfortunately can't find again. I think most of the submissions were made by a handful of users and they never referred to the effect by name. It was mostly artistic applications such as an angel infinitely rising upwards just by flashing two images. If someone finds it again, please let me know!
- soulofmischief 7y ago
  I too tried to find a few collections I've come across, but no luck... not too sure of what search terms to use. Was hoping someone else would come in clutch.
panic 7y ago
> Are there any other good non-static optical illusions such as this? As in illusions which require some element that changes over time cyclically in order to produce the effect? Here's one which uses the surrounding color to make synchronized flashes look like alternating flashes: http://illusionscience.com/contrast-asynchrony/ http://illusionscience.com/contrast-asynchrony/
- ehnto 7y ago
  That is excellent. I developed a trick when playing piano where I can roughly count two things at once for a short period of time (Any Murakami fans? Hard Boiled Egg and the End of the World made me try it!). When I tried to do that to count the flashes the one I was looking at felt like it sped up to match the other one but I couldn't count both at once. My brain was well and truly tricked.
  - soulofmischief 7y ago
    > I developed a trick when playing piano where I can roughly count two things at once for a short period of time. Something tells me that developing this skill could be greatly aided by an interactive visualization. That's something I might look into.
itronitron 7y ago
Here is one that looks like a train coming into a station. https://youtu.be/1dgLEDdFddk https://youtu.be/1dgLEDdFddk
- soulofmischief 7y ago
  Ha, nice one. I studied that movie in Film History.

zawerf 7y ago

There is a large collection of gifs based on the reverse phi illusion in a tiny obscure subreddit that I unfortunately can't find again. I think most of the submissions were made by a handful of users and they never referred to the effect by name. It was mostly artistic applications such as an angel infinitely rising upwards just by flashing two images. If someone finds it again, please let me know!

soulofmischief 7y ago
I too tried to find a few collections I've come across, but no luck... not too sure of what search terms to use. Was hoping someone else would come in clutch.

panic 7y ago

> Are there any other good non-static optical illusions such as this? As in illusions which require some element that changes over time cyclically in order to produce the effect? Here's one which uses the surrounding color to make synchronized flashes look like alternating flashes: http://illusionscience.com/contrast-asynchrony/ http://illusionscience.com/contrast-asynchrony/

ehnto 7y ago
That is excellent. I developed a trick when playing piano where I can roughly count two things at once for a short period of time (Any Murakami fans? Hard Boiled Egg and the End of the World made me try it!). When I tried to do that to count the flashes the one I was looking at felt like it sped up to match the other one but I couldn't count both at once. My brain was well and truly tricked.
- soulofmischief 7y ago
  > I developed a trick when playing piano where I can roughly count two things at once for a short period of time. Something tells me that developing this skill could be greatly aided by an interactive visualization. That's something I might look into.

itronitron 7y ago

Here is one that looks like a train coming into a station. https://youtu.be/1dgLEDdFddk https://youtu.be/1dgLEDdFddk

soulofmischief 7y ago
Ha, nice one. I studied that movie in Film History.