yangji I am going to try a facial animation similar to live2d. Are the same parameters as live2d available in the spine tool? Is it possible to mix facial expressions with a combination of mesh and bone animation? How is it possible to use the facerig library with these features? If you have experience testing similar animations, share your know-how. Please refer to the video below.
Mario Spine currently does not support face animation as shown in the video of yours. To animate faces, you go through the same animation process as used for the rest of the skeleton.
yangji Create a clips of each facial expression with a bone, Does the unity engine support tracking face bones? Like the eye constraint example provided