I made a magnet from pictures of ponies from PonyTown game. No multimaterial needed just overlaying several layers of different filament colors.
filaments order:
Prusament Vanilla White
Prusament Silver gray
Prusament pineapple yellow
Prusament opal green
Prusament lipstick red
Prusament jet black
smurf blue
Prusament Royal blue
The author hasn't provided the model origin yet.