I need normals of border vertices on object A to match normals of vertices in same coordinates of object B, basically to fix the seam without affecting object B. Tried noors normal thief and it does almost that, except there is still a small split that prevents smooth shading. Interestingly enough is that in-house tool…
If it's not a metric ton of verts you need to match you can do what Klunk said, select both objects, add an edit normal modifier but now instead just copy value and paste value from one normal to the other. It'll not be the best way if you need to do this a lot, since it only works by doing one vert at a time
there are other ways to do it, storing the edge normals in an array would have been a better way to go but it was really just a cut and paste script I had code that worked that way. In general keeping normals in a mapping channels work well with scripting as you don't need the object selected and to be in the Modify Panel…