Printing multiple materials

OK, I apologize in advance if this has already been answered.

I see that models can be printed with multiple materials, what do I have to do to do that? As an example, a set of dice that are white with black dots.

Thanks,
P O C

There are printers that offer multiple materials. We don't offer multiple materials though. We do have full color sandstone which allows you to upload a texture map with your VRML or X3D file to print models that are colored as they are printed.

Thanks. I saw it on a youtube video, an iPhone case by Shapeways. I guess that was OBE.

P O C

What about printing multiple parts and putting them together? Are the printers accurate enough to do that?