Stranger things hue forge, can be made using 5 colours on ams systems or manually changed by pausing on the layers in the information below.

created with filament painting technique using hue forge software.

if you want to scale, do it only with x and y axis, z must be the same as original.

if you don't have ams just put pause on specified layers and swap filament manually

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 #6 (0.56mm) swap to Blue
At layer #14 (1.2mm) swap to Red
At layer #18 (1.52mm) swap to Yellow
At layer #21 (1.76mm) swap to White for the rest.