How to make a tallest square origami box (page 17)

 

31. Rotate the origami box model by 90 degrees.   Prepare to apply two "mountain-folds" and one "valley-fold" .   Make sure to utilize the existing crease lines when you apply two "mountain-folds" .   This folding technique is called an "inside reverse-fold" .

32. Start applying the "inside reverse-fold" of the step #31.

 

 

 

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