Scattering plot mapping the point-wise (cell) values of original SIMBA and smoothed temperature fields for the Fiducial and NoAGN models (colours and contours), as a function of redshift (left to right) and for three selections of the underlying original HI density field (top to bottom for low, mid, and high density; see legend). The fraction of outliers with |log T_MF − log T_SIMBA| > 1.5 is marked by dotted lines and indicated in each panel (in parenthesis, the fraction with respect to the full sample). Contours account for 100, 1 000, and 10 000 counts, not shown if sparse.