There is still room for improvement on this one. I only had these 4 colours available and thought why not, lets see how this comes out.

Print at 100% infill and 2 walls with a layer height of 0.08mm with a base layer of 0.16mm 4 colours

Filaments Used:
Bambu Basic black Transmission Distance: 0.6
Bambu Matte Latte Brown Transmission Distance: 2
Bambu Matt Dark Brown Transmission Distance: 2
Bambu Basic Jade White Transmission Distance: 4

Swap Instructions:
Start with Black
At layer #11 (0.96mm) swap to Dark Brown
At layer #14 (1.2mm) swap to light brown
At layer #16 (1.36mm) swap to White