Model
Smooth the mesh
A character starts as a coarse cage of points. Each smoothing pass replaces every edge with two new points — weighted averages that pull the corners in. Repeat it and the silhouette settles into a smooth curve.
new = (3A + B) / 4 and (A + 3B) / 4
Smoothing passes0 · 9 points
The dashed line is the original cage. Each pass cuts corners with weights 3 and 1. By the third pass the silhouette reads as one curve.