Start with the head shape and hairline
Mark the part and overall hair volume
Sketch the main wave direction
Draw loose S-shaped strands
Add curved lines for layered sections
Vary strand thickness and spacing
Build depth with overlapping waves
Refine the silhouette of the hairstyle
Add smaller flyaway strands
Shade under overlaps and near the roots
Darken inner folds of the waves
Blend highlights along the curved ridges
Clean up construction lines
Finalize edges and texture details