I tried to do both
-anat2epi and -epi2anat
just to view the differences. In epi2anat, my anat appeared smaller than my mask and the mask (which essentially covers the whole brain or is supposed to at least) had an outline around it as if it fit the anat with skull better than anat_ns. However, the anat2epi fit the mask perfectly within the anat_ns. Is there any reason why I would want to do one over the other? I know anat2epi is default and seems to work better, but in what situation would I do epi2anat?