@jlampel
I have also gotten rid of most of the baking artifacts. It’s starting to look good but I still can’t get specific parts of the mesh to mirror correctly. It seems like some of the faces are swapped. It doesn’t have anything to do with the Tri-Planar projection as I always use UV Projection. I’m not sure if you saw it last time but when I select one part of the mesh with CTRL-R it seems like my theory is correct. See how some of the faces are not yellow? Those are the exact places that are causing trouble. I tried moving each vertex with snap to vertex but it doesn’t seem to work.

