Hey thanks for the follow up.
Everything I tried failed to solve the issue with the Vertex Delta model, so my guess is that it’s a bug.
However, I tried again with Neural Morph and got it to work by setting the compression and vertex delta threshold to 0.
The result is pretty good, I trained it with 4D data and it definitely enhances the realism. It’s a shame there isn’t more documentation or instances of people using this, I understand it’s somewhat experimental but it seems like there is huge potential.