Dear Freesurfer experts,

I have a binary brainmask made in volumetric space and trying to transfer it into surface space,  first I use mri_vol2surf to transfer the mask into fsaverage space, then run mri_surf2surf (fs 6.0)  to down sample it to fsaverage5 space.

After vol2surf, some values on the vertex in fsaverage space would be less than 1 due to the interpolation, however,  I find values on these vertexes (<1 in fsaverage) come to be 0 after mri_surf2surf in faverage5 space.

it doesn't happen in version 5.3,  how can I solve this in 6.0?

Many thanks,

Dong Haoming