We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
https://discuss.afni.nimh.nih.gov
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
Try 3dNwarpFuncs. I'm no expert on VBM, but the -bulk option gives you the Jacobian information that I think you want. Warps that are composed similarly by other packages should work the same as long as they are dx,dy,dz volumes.