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Paper: Elephant Hide
Type: classic tessellation, wet-folding (implies: abstract tessellation, abstract, geometric, pattern, abstract periodic tessellation, non-recursive periodic tessellation, periodic tessellation, tessellation)
Author: Michał Kosmulski
It may not look like it, but this tessellation is a variant of my Twisted Bird Base Tessellation. This and the octagonal pattern result in the name octabird. The central part of each octagon can be arranged in a number of ways, two most obvious of which are visible in this image.
The collapse is rather challenging since it requires a standard twisted-bird-base collapse first (which in itself is not very easy) and then a series of closed sinks which are inconvenient to perform with stiff paper. Wet folding helps a lot.