3D visualisation of ch012023. The horizontal, corrugated slice represents the τ₅₀₀ = 1 surface, coloured by the photospheric vertical magnetic field B_z. Vertical convective velocities v_z are illustrated at the side of the upper convection zone, and magnetic field lines are coloured with temperatures. Fifteen-by-fifteen seeds have been uniformly distributed horizontally at 3 Mm to trace the magnetic field lines, which connect to different structures, primarily magnetic concentrations located in intergranular lanes at the photosphere. Magnetic field lines are coloured by temperature, ranging from pink in the temperature minimum region of the chromosphere (∼4000 K), to white in the TR (∼40 000 K), and green when reaching the low corona at the top of our box (∼500 000 K). Note the vortex-like pink feature at the middle of the box, known as a ‘magnetic tornado’. An animation covering 12 s, (30 solar minutes) is available online.