Attention all Nerds

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Warning - What you are about to read is of a nerdy nature. If such things offend your inferior intellect, please go away.
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The other day I stumbled across this. It is a project led by Universiteit Leiden and UC Berkeley. The aim of the project was to complete a work by Escher, Print Gallery using mathematics alone. The picture implies a twisted version of the Droste effect, where a picture features a picture of itself. Escher was a great mathematician(he never graduated high school), and he often used complicated grids to transpose a 'straight' drawing into a twisted version.

I'm not going to describe the process of how he did this or how the project completed the piece, because it is over my head. But it is still interesting to see pictures of the different steps they went through to achieve the final result(including a straightened out version of the original! Very cool.) If you have a good understanding of math, you'll probably appreciate the article they have linked(PDF format) that describes the whole process in great detail. And for those of us that don't understand the methodology, we can still be impressed with the result. The page also features some blowups of the completed picture, so that you can see how far in it goes.

I thought it was cool, anyway.