Watched it one more time. From 6.30 to 10.30, as far I understand we create a texture map from a much more complicated vertex geometry to apply this texture map onto a much more simple vertex geometry. Selections and “unhide our lower res shaded gizmo wich is on layer 2 and if I move this off to the right side”. So this file contains 2 objects. That took a while for my smart-part in my low res brain to understand.