This may be related to the recent changes in the mri histogram function.
Discussion Importantly, see the new option to manually define a threshold.
Commit
Note that some comments on the low importance of the head shape should be adjusted since this surface is sometimes used for head modeling.
Edit: I found an issue with that commit. Working on a fix. Will discuss that in the post above.
@Guiomar @Jeremym @Francois The MRIs in the raw folders have better face masking and better looking histograms than those in the freesurfer folder. On OpenNeuro it mentions that they were defaced with different functions which is odd. When importing the whole thing through the BIDS import, the MRI from the freesurfer folder is added last and used by default, creating the head surface from it. Could we fix this so the MRIs match between the raw and derivatives folders?