Two snapshots from 6 September 12:24 UT from different viewing angles where the photosphere is represented by the simulated B_z magnetogram (white to black) with a colour bar in Tesla. Plotted are three sets of field lines: the white to blue lines which connect from A+ to A−, the yellow to blue lines which connect from B+ to B−, and the white to purple lines illustrating a null point between A− and B−. Also shown in the inset is an excerpt of a photospheric map of the twist T_w, with a colour bar from negative (blue) to positive (red), illustrating the seed points of the field lines from A+ and B+. A grey to black line is superposed onto the twist map illustrating the base 10 logarithmic squashing factor Q from 3 to 4. The structures reach a peak height of approximately 82 Mm.