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

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• Start from
• Assume that the top tile of the bridge is of slash type, otherwise continue specularly
• Fold down the "bridge" with all three tiles stacked in a single pile and the East vertical tile ending up on top (third floor).
• Fold left the two eastern tiles (valley fold) ending up with a 2x2 square
• Rotate it such that in the north row we have a stack of 2 tiles (West) and 1 tile (East), whereas in the south row we have a stack of 4 tiles (West) and 1 tile (East)
• Now open in 3D with the following hinging:
  • the two stacked tiles in the North-West position are hinged along the North edge
  • the upper two stacked tiles in the south-West position are hinged along the West edge
  • the two middle stacked tiles (SL) hinged East
  • the two lower stacked tiles (SL) hinged South
• End up with the final shape