What I am trying to do is to transform the “Initial” (Green) to match “Final” (Yellow), and apply that transformation to “Shell” (Purple). I used SlicerCMF’s surface-based registration feature for this, and when I applied the transformation to the “Shell” (Purple), it worked exactly as I had intended (here the transformation matrix is named “SurfaceReg”).
But when I export the “Shell” (Purple), and open it in another software (Meshmixer), it give me the original, untransformed model. Here, “Shell” is in brown.
No need to apologize, this is not trivial I think. But I cannot think of a good way to facilitate this. Maybe a popup asking about hardening on save, but the saving mechanism is not really designed to incorporate such warnings. Maybe there could be an option in the save dialog in the row of the model (if not there already), but it’s really not visible. Hopefully others with the same problem will find this topic.