Comparison of different parameters and processing for frame 16 of the AR12473 TMFM simulation in the plane of x ≈ 0.7 Mm: Panel a shows the log(Q) map, and panel b the twist map. The morphological gradient using big structuring elements is shown in panel c, and its combination with the twist map from (b) is shown in panel d. Panel e is the same as panel c, but with smaller structuring elements, and panel f is the combination of T_w from panel b with the morphological gradient in panel e. Finally, panel g shows the mask of high-twist areas as extracted from the twist+gradient map in panel d (using a threshold of 0.8); panel h shows the same mask, but after post-processing, mostly removing the twisted channel that connects to the main structure at about y = 75 Mm.