From a more practical standpoint, Poser meshes aren't "watertight". 3D printing is not yet at a common consumer level or work, so it's not designed to readily work with 3D meshes designed for artistic use. A 3D printer will fill in all closed meshes. If there are any openings, it will continue to fill in the areas outside the openings. A simple sphere or cube is straightforward because everything is closed off. The head of many Poser character has openings for the eyes and mouth that are filled in with other meshes for eyeballs and inner mouths. Poser hair is usually made realistic by transparencies. A 3D printer only looks at the mesh, not the transparency texture. Adding clothing and hair to a figure creates new meshes for a 3D printer to fill in separate from the main figure.

Before this can be a consumer product, software will be needed to quickly optimize a model for printing to close off a model, combine all objects so that there is only a single mesh, add thicknesses for the printer to minimize printing very thin meshes. Right now, there is a laborious process to prepare a model for printing.

I cannot swear to it, but I seem to recall a 3 inch model costing about $100. The process isn't cheap. The resulting model usually looks like a rough layered object that requires sandpaper to smooth out the model.

It's a cool process with great potential application, but it's not ready for consumer use yet. It's great for industrial applications to build prototypes because the CAD software is designing solid objects.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon