Additive animations

We are using FaceFX in UE 4.15.3 and would like to have FaceFX be additive so they can apply after head tracking. There are options in the "Blend FaceFX Animation" anim blueprint node for blend mode "Add to Existing". But when I turn that on, instead of becoming additive, it explodes the characters face in a bad way. This occurs even if the BlendFaceFXAnimation node is the only thing in the anim bp (there are no other animations playing).

Any idea why something like that would occur?

Sorry for the delayed response here. "Add to Existing" is currently not supported by the UE4 plugin, but we are looking into adding it.

If you have a commercial license to the FaceFX Runtime, please contact us via email if you need additional support until this feature is added.