This Mushroom Forest Light Switch Cover Plate Was designed with a mix of Fusion360, Hueforge, and Meshmixer. Fits a standard light switch toggle.

I applied variable layer height to save print time on the base plate before the colors start. If you remove the layer heights you might need to adjust what layers the colors change at by a layer up or down.

Generally, though the layers should be colored as follows:

    Start with Black
    At 5.3mm swap to Brown
    At 5.78mm swap to Green
    At 6.42mm swap to Brown
    At 6.58mm swap to Bone White
    At 7.22mm swap to Brown
    At 7.30mm swap to Bone White
    At 7.86mm swap to Red
    At 3.68mm swap to White for the rest.