What we have to do now is to bake the scales_tiles.png
image map (used in all the materials and mapped on the UVMap_scales coordinates layer) on the 5 tiles of the UVMap coordinates layer.
At this moment, Blender is not able to bake automatically outside of the default U0V0 tile space yet, so a bit of additional work is needed; nothing particularly difficult by the way. The steps are as follows:
Press Tab to go into Edit Mode again and then put the mouse in the blank_U0V0 UV/Image Editor window; press the N key to call the Properties sidepanel and under the Display subpanel, check the Normalized item:
Press N again to hide the Properties sidepanel. Go to the UV Maps subpanel under the Object Data window and click on the + icon button to the right to add a new UV coordinates layer (UVMap.001), then rename it UVMap_temp (or...