7. Why toon shading shows normal errors
The threshold, and how much the surface curves.
Triangles: · Drag the view to turn it.
- The sphere has bumps so small you can hardly see them. With smooth shading (toon off) they are almost invisible.
- With toon shading, the shadow edge wobbles. Near the threshold, small normal differences become the shape of the line.
- Raising “Soften the shadow edge” blends a little around the threshold, so the wobble stands out less.