Origami butterfly based on open-closed sink-fold (page 3)

 

03. Apply the horizontal valley-fold of the step #2.   It is actually easy to apply this fold since the top of the triangle should be located at the center of the height.   Prepare to unfold.

04. Unfold the previous valley-fold of the step #3.   Prepare to apply a "open-closed sink-fold" using the crease line that you just have made.

 

 

 

1 2 3 4 5 6 7 8 9 10 11 12