Deer Freesurfer Experts,

I'm dealing with the monkey data. I convert the 0.5mm resolution monkey data into "fake" 1mm space using "mri_convert -iis 1 -ijs 1 -iks 1 "and create surfaces. I want to obtain the white/grey matter inferface in the raw 0.5mm volume space from white surface. I use the mri_surf2vol command but it is larger than the raw 0.5mm space.  How could I acquire the white/grey matter inferface in the raw 0.5mm space ? 

Thank you very much.

Best,

Luqi