VecFieldLIC visualizes 2D autonomous dynamical systems by means of the Line Integral Convolution (LIC) technique duced by Cabral and Leedom in 1993. A 2D autonomous dynamical system is defined by two coupled first-order differential equations dx/dt = P(x, y) and dy/dt = Q(x, y) with P and Q being two arbitrary C^1-differentiable functions of x and y.