I'm a huge fan of Game of Thrones. That's why I bought the Hueforge software and would like to print some 2D art in the future. Here is my first attempt: A Song of Ice and Fire.

Imporant:

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

Swap Instructions:
Start with Black
At layer #9 (0.8mm) swap to Grey
At layer #17 (1.44mm) swap to Ash Gray
At layer #20 (1.68mm) swap to White for the rest.

I used: Sunlu PLA Meta black, Aurapol PLA silver, Geetech PLA Stone grey and Geetech PLA White. The stone gray is a little too light and you can hardly distinguish it from the white. I think a light gray (which is a bit darker ^^) would look even better. Try it too and let me know! :)