Map of the World - Countries have different layer height so you can see them better (or you can use additional color changes for even better visibility)

For Black and White:

Wall Loops: 1

Initial Layerheight: 0.16
Layerheight: 0.8 

bottom shell layers: 999

Color change at layer 9.

(There is something wrong with Bambu Slicer - it complains the model has floating regions (which is wrong) , so I enabled supports - now it doesn't complain anymore - but it also didn't generate any supports …. (orca slicer didn't complain about floating regions) )