Beautiful curved grid?

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Author:

OSjerick

Last Updated:

10 years ago

License:

Creative Commons CC BY 4.0

Abstract:

A variant and a combination of Hering's and Zöllner's illusion. The red grid is completely straight all the time.

Submitted as an answer to the Showcase of Optical Illusions question on TeX SX.

Click the Illusions tag below to see more!

Tags:

\begin{now}

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% Source: http://tex.stackexchange.com/a/150306/23931
\documentclass[border=10pt,tikz]{standalone}
\pagecolor{gray!5}
\begin{document}
    \begin{tikzpicture}[x=4cm,y=4cm,every rectangle node/.style={draw,thick,red,rotate=45,minimum width=0.707*4cm,minimum height=0.707*4cm}]
        \foreach \y in {1,...,3}
            \foreach \x in {1,...,3}{%
                \foreach \diameter in {1,...,6}
                    \draw[gray,thick] (\x,\y) circle (1/12*\diameter);
                \node[rectangle] at (\x,\y) {};
            }
    \end{tikzpicture}
\end{document}

Beautiful curved grid?

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