Synthesised intensities for JWST NIRCam’s F182M filter with a simulated MASK210R coronagraph (MEDIUM8 readout pattern, 10 groups for 10 integrations). The orange and blue lines indicate the (τ = 1)-surfaces from r = 0 and z = ∞. We find a slight difference in the vertical extent of the ‘no wind’ and ‘wind’ ‘fixed’ models. At i ≳ 75°, a faint cone-like pattern emerges, in agreement with the direct radiative-transfer results of Fig. 7.