Invisibility Tiles Can Cloak Any Shape - Technology Review: Creating a cloak that exactly follows the shape of the object it is intended to hide is hard because curve cloaks are hard to make.
Instead, Paul and co approximate the shape using flat facets. These 'invisibility tiles' fit together in the same way as the triangular facets in a computer animation. And since each flat tile is relatively simple and easy to make, it becomes much cheaper and easier to build complex cloaks.
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