@AkiyoshiKitaoka how about _not_ specifying what the illusion exactly is when you post one? The explanation can be posted in a reply tweet. It would be a pleasant exercise/surprise to your audience to figure out illusions themselves. It will also be a true test of the illusions.
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Replying to @curioman2
What do I mean with this image?pic.twitter.com/pcatF8Te0D
1 reply 0 retweets 0 likes -
Replying to @AkiyoshiKitaoka
RGB on the top, CMY on the bottom. No black/white/grey anywhere, and yet images appear black & white ?
1 reply 0 retweets 1 like
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