I've tried using Designer to bake my normal map, but it always comes out messed up for one reason or another. However, when I bake in Painter with the same settings and meshes, it turns out fine. So, I've been using Painter to bake and Designer for texturing. I'm having problems with these beams, though. When I apply the normal map onto the mesh, it looks different than it does in Painter. There is noticeable stretching and, in some areas, little to no normal detail compared to Painter.
Also, I am running my color map through the tri-planar node to get rid of the seams, but the seams are still there. I don't know if I'm not using it correctly, but I couldn't find anything online that works with my specific setup.