I generated a 4 color STL of the Samurai Girl with the amazing HueForge program. I used Red colors but you can use any color combination you want but it is recommend to go from dark colors to light colors. if you interested in how I made this file you should check out HueForge its very affordable and only takes some messing around to get used to the program and make amazing looking prints.

Print at 100% infill with a layer height of 0.08mm with a base layer of 0.16mm

Filaments Used:
PLA PolyLite Black Transmission Distance: 0.3
PLA PolyLite Wine Red Transmission Distance: 1
PLA PolyLite Yellow Transmission Distance: 11
PLA PolyLite White Transmission Distance: 5

Swap Instructions:
Black until layer #7 at 0.64mm
Wine Red until layer #12 at 1.04mm
Yellow until layer #16 at 1.36mm
White for the rest.

The slicer software I used was Bambulab and the printer is the Bambu X1 carbon with AMS.

Keep and eye out if your interested in more HueForge models I plan to upload many more.

Thanks