Top: vertical component of the magnetic field of the settled model atmosphere. Orange lines depict the magnetic magnetic field lines. Bottom: comparison of the model atmosphere with the observations from GM21 of pore 3. The maximum observational value within the pore is shown by obs. peak, while the horizontal average across the whole pore is shown by obs. average. The green lines show the model values for the indicated lines in the top figure (line 1 at pore axis).