I always found Bezier curves strange - they seem awful as a way to approximate curves. When you "draw" with a Bezier curve in Illustrator (or Inkscape), the lin

I always found Bezier curves strange - they seem awful as a way to approximate curves. When you "draw" with a Bezier curve in Illustrator (or Inkscape), the lines tend to fly all over the place - they can be an OK approximation but they're often very unstable. The problem, I think, is that any polynomial or equivalent higher order is going to have this instability property.