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

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• Start from L-3
• turn down 180 degrees the two south tiles on top of the two stacks and arrange the two superposed tiles originally in the north-most position such that in the end we have a 2x2 square such that in the north row we have a stack of 2 tiles (left) and 1 tile (right), whereas in the south row we have a stack of 4 tiles (left) and 1 tile (right)
• Now open in 3D with the following hinging:
  • the two stacked tiles in the north-left position are hinged along the north edge
  • the upper two stacked tiles in the south-left position are hinged along the left edge
  • the two middle stacked tiles (SL) hinged right
  • the two lower stacked tiles (SL) hinged south
• End up with the final shape