How to make a 3D four-pointed origami star (page 15)

 

27. Apply the outside reverse-fold of the step #26.

28. Open the paper.   The final crease pattern (CP) is given here.   Since the paper has all the creases that you need, you only need to make a crease into either valley-folded or mountain-folded one according to the CP.

 

 

 

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