I tried an older tutorial but it seems the files don't exist anymore in the tutorial dataset (https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Visualization). However the image provided is what I would like to create as a figure. It is not necessary to overlay onto the participants brain and could easily get away with overlaying it on a standard brain.

I was given analysis files from FSL. Namely the one I was told to overlay was *.nii.gz file following the FEAT analysis from FSL.

Regards in advance.