In physics, a field is a physical quantity which can vary at different points in space-time. The gravitational field, electric field and magnetic field are fields of force of the respective kinds. In fluid flow, the distribution of velocity (speed and direction) of fluid elements constitutes a velocity field.

The pictures in this series draw inspiration from the physical concept of a field and its visual representation in the form of field lines (for example, streamlines which show the flow in a current of air or water). Various ideas such as homogeneity, directionality, density and superimposition are explored freely and informally by means of linear structures.