FAnimationRuntime::BlendPosesPerBoneFilter

Blend Poses per bone weights : The BasePoses + BlendPoses(SourceIndex) * Blend Weights(BoneIndex) Please note BlendWeights are array, so you can define per bone base This supports multi per bone blending, but only one pose as blend at a time per track PerBoneBlendWeights.Num() == Atoms.Num()