Skulls! 20cm x 20cm tile. This uses 8 colours, but no AMS needed, you can swap filaments. This printed out and looks way better than I imagined it would. The 3D texture really adds to it. This was made using layer painting with Hueforge.

Print at 100% infill with a layer height of 0.08mm with a base layer of 0.2mm

Filaments Used:
PLA Generic Black Transmission Distance: 0.2
PLA Basic Gray Transmission Distance: 2
PLA Basic Dark Blue Transmission Distance: 4
PLA Basic Green Transmission Distance: 2
PLA Basic Red Transmission Distance: 4
PLA Basic Yellow Transmission Distance: 6
PLA Light Blue Transmission Distance: 3.6
PLA Basic White Transmission Distance: 5

Swap Instructions:
Start with Black
At layer #10 (0.92mm) swap to Gray
At layer #12 (1.08mm) swap to Dark Blue
At layer #15 (1.32mm) swap to Green
At layer #16 (1.4mm) swap to Red
At layer #21 (1.8mm) swap to Yellow
At layer #26 (2.2mm) swap to Light Blue
At layer #29 (2.44mm) swap to White for the rest.