> (d) “Three-dimensional printer” means a computer-aided manufacturing device capable of producing a three-dimensional object from a three-dimensional digital model through an additive manufacturing process that involves the layering of two-dimensional cross sections formed of a resin or similar material that are fused together to form a three-dimensional object.

https://law.justia.com/codes/california/code-civ/division-3/...

I expect someone to get around this by modifying the slicing software to use a different algorithm that doesn't rely strictly on layering 2D cross sections.

-resin or similar material

Or just start printing them out of something useful like metal