In the previous recipe, we made the scales image texture seamless, ready to be seamlessly mapped on our model. If you go back to Chapter 5, Unwrapping the Low Resolution Mesh, you'll remember that we assigned two different sets of UV coordinate layers to it: the UVMap layer, divided into 5 different tiles (this is called UDIM UV Mapping; it's a popular standard in the industry and means U-Dimension), and the UVMap_scales layer, set up to repeat the scales_tiles.png image pattern at the right size on the model:

The two UV coordinates layers in the UV Maps subpanel

By zooming in and looking carefully at the result of the tiling (in Textured Solid mode, which is enabled under the Shading subpanel of the N viewport sidepanel), you can see that although we used a tileable scales image, we still have seams in some areas. This is obviously due to the fact that the UVMap_scales layer (as you can see in UV/Image Editor in the Edit Mode after selecting all...