Spatial appearance of campfires. Panels a and b: another example of a campfire in the same format as in Fig. 4 (at time t = 260 s). Panels c and d: projection of the field lines in panel b onto the vertical y − z plane. All the field lines are mostly in a vertical plane at a ca. 30° angle to the y-direction. Therefore we scaled the side view in panels c and d so that the field lines appear at the approximately correct aspect ratio of the horizontal to vertical extent. In panel c we overplot a mask of the EUI 174 Å emission in purple, and in panel d the heating rate is overplotted (resistive plus viscous) in cyan. An animation of panel c is available online. See Sect. 3.3.