Drawing better looking curves I've recently been learning about how to draw smoother curves that look more appealing. A common technique in professional CAD and font design software is to use a visualisation called a curvature comb to see how sharp or flat a curve is along its path. Here's an example of a curvature comb being used in Fontlab VI to smooth out bumpy spots in a font: To explain how this works, let's explore how Bzier curves work. Cubic Bzier curves Most vector graphics software uses cubic Bzier curves to display curved lines. A cubic Bzier curve is defined by four points: P, P, P and P. The curve starts at P moving toward P and arrives at P coming from the direction of P.