Owl generated on Midjourney and STL generated with HueForge. No MMU or AMS required. Small enough to print on the Prusa Mini, but I included the HueForge project if you'd like to mix things up a bit.

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

Swap Instructions:
Black until layer #5 at 0.48mm
Dark Gray until layer #10 at 0.88mm
Light Gray until layer #19 at 1.6mm
White for the rest.