Wall picture - colosseum made of 5 pieces and 4 colors
HueForge:
Layer hight 0,08
Base layer 0,16
You need:
-BLACK
-DARK GRAY
-LIGHT GRAY
-WHITE
Start with black
At layer #5 (0.48mm) swap to dark gray
At layer #9 (0,8mm) swap to light grey
At layer #13 (1,12mm) swap to white