Set the morph target model deltas as an array of 3D vectors. These deltas are used to generate compressed morph targets internally. You typically call this method from inside the python training script once your morph target deltas have been generated there. Concatenate all deltas into one buffer, so like this [morphdeltas_target0, morphdeltas_target1, ..., morphdeltas_targetN]. This is the same as SetMorphTargetDeltaFloats, except that it takes vectors instead of floats.