[specproc]

Injected plastic. Resin occasionally, but it's premium and GW have pretty much discontinued it.

There's definitely a quality component, which will be part design and part manufacture. GW minis are substantially better quality than other brands.

The interesting thing now is resin-based 3D printing! I've done a load and it's great fun. The process is not quite ready for mainstream adoption, resin is icky, but that's the exciting thing to watch out for in the space.