Droste effect

Sunday challenge 164

Harry was a reluctant model, but he did get some treats.

The Droste effect, known in art as an example of mise en abyme, is the effect of a picture recursively appearing within itself, in a place where a similar picture would realistically be expected to appear. This produces a loop which in theory could go on forever, but in practice only continues as far as the image's resolution allows.
Wikipedia

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