Overview of intensity and atmospheric properties at the formation height of the intensity profile minimum. Panel (a): Continuum intensity at λ = 500 nm shown as the brightness temperature. Panel (b): Intensity at the profile minimum (λ_min) of the Ca IIλ854.2 nm spectral line shown as the brightness temperature. Panel (c): Temperature at the formation height of the line profile minimum. Panel (d): Formation height of the line profile minimum, h_λmin = h(τ_λ, min = 1). Panel (e): Vertical velocity at h_λmin. Panel (f): Vertical component of the magnetic field at h_λmin. The line profile minimum and the corresponding formation height are individually determined for each column in the atmosphere. The color scale limits are clipped to increase the contrast of the images (see text). The intensity (panels a and b), as well as the formation heights that were used to create panels (c), (d), (e), and (f), originate from the IM RT computation from the snapshot muram_en_518000_503s.