The current model is generated using 26 8064*6048 photos taken by DJI drones.
One 8K UV is used in material.
In the new generation of engines (such as UE5), it is recommended to set the AO map to 0.5 or deprecated.
The cu map records the curvature information of the model.
AO maps and CU maps facilitate secondary creation in the mapping software.
Another inexpensive way to add detail is to overlay a CU map on a base color map in the 0.1 or 0.2 way.