Dear Samuel,
Thank you for your interesting and reply. The Chinese warrior model is very cool.
Please find another post below of 3D Printing coin, I made a few months before. If it interested you.
https://community.wolfram.com/groups/-/m/t/1569688
It's possible to use Mathematica to design and create 3D relief model for CNC or 3D printing.
However, if the initial model is big or complex, the processing will be quite time-consume.
It model and mesh quality is not high, it needs effort for debug some errors