![Optical illusion](https://www.roumazeilles.net/news/fr/wordpress/wp-content/uploads/optical_illusion_19.png)
The central bar is actually fully homogeneous despite the feeling we have that its a gradient (due to the inverse gradient of the background; Hide it and you will see!).
The central bar is actually fully homogeneous despite the feeling we have that its a gradient (due to the inverse gradient of the background; Hide it and you will see!).
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