Four-fold foundation
Two diagonal valley folds and two center mountain folds describe a compact base pattern.
Origami
Square paper, valley folds, mountain folds, generated crease SVGs, and step-by-step folding diagrams.
Crease grammar
Named fold families such as diagonal, book, kite, petal, wing, neck, and head.
Mark diagonal references across the square.
Add book folds through the center axes.
Pull corners toward the center structure.
Resolve smaller folds into a bird-base form.