The muscle memory in my fingers recognizes the Good Luck Crane folds now. But, I still had to stop the YouTube instructional video a few times to check the plumage folding steps.
I learned to really look at the crane model this morning. It is so three-dimensional yet I have only studied the item from a single view before today. Here are various angles of the bird.
The last photograph of the square paper with folds is called a “crease pattern.”
Yes, I destroyed the Good Luck Crane by opening it up and examining all the folds in the paper just to look at the crease pattern. What a discovery!
Here is an eye-opening article on “Crease Patterns as Art” by the famous Origami artist/composer Robert J. Lang: http://www.langorigami.com/article/crease-patterns-art.