Step 1:
Stacks of individual origami units.
Step 2:
Putting them together piece by piece.
This step in fact, is the most challenging step of the model.
The individual units don't hold together well at this stage because there is very little tension, unlike the next step.
Step 3:
At this step, adding more units are fairly easy because they hold each other well because of tension.
Step 4: Completed model.
The final model holds itself together primarily because of tension.
The structural strength however, is not as sturdy because of the thin material of the paper.
