I've been learning a lot lately, about 3D modeling (making reliefs-.stl files), and I wanted to pass on something I wish I would have learned years ago.
There are FREE 3D modeling softwares with Amazing capabilities.
These will save .STL files, and others, that can be opened in meshcam, and probably some free cams too.
The point is, a CAM that tries to do the same modeling, well close, is $1000's of dollars.
Blender, and Sculptris is FREE!
I'm amazed, and feel ignorant, sometimes
Not to mention 3D scanners (good ones not free)