[previous configuration] [up to this 3D shape] [next configuration] ― Configuration code: RRUvRDvUvRDv

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• Start from
• Close it in a 3x1 vertical rectangle made of a stack of four tiles in the lowest position and two stacks of two tiles
• Open it vertically in a 3x2 rectangle with two stacks of two tiles in the lowest row
• Turn the top tile of the right stack of two tiles 180 degrees to the left (valley fold). Note: act specularly if this move is not possible
• Lift up 180 degrees a pair of adjacent tiles
• Open in the final shape