If you can edit source mesh and render new texture, do that, it is easiest.
If not, then i think you could use vertex paint. Paint those near vertexes to some RED, then make vertex blending mat with color that hides seam.
If you can edit source mesh and render new texture, do that, it is easiest.
If not, then i think you could use vertex paint. Paint those near vertexes to some RED, then make vertex blending mat with color that hides seam.