Here's a population density map of the US using hueforge. All of the details are below: 

Print at 100% infill with a layer height of 0.04mm with a base layer of 0.16mm

Filaments Used:
    PLA PolyTerra Charcoal Black Transmission Distance: 0.3
    PLA PolyLite Natural Transmission Distance: 21
    PLA BambuLab Basic Red Transmission Distance: 4
    PLA Overture Matte Light Brown Transmission Distance: 0.6
    PLA PolyLite White Transmission Distance: 5
 

Swap Instructions:
    Start with Charcoal Black
    At layer #10 (0.52mm) swap to Natural
    At layer #24 (1.08mm) swap to Red
    At layer #29 (1.28mm) swap to Light Brown
    At layer #30 (1.32mm) swap to White for the rest.