Photoshop has been updated to include 3D printing support. This
Photoshop.com blog post
provides lots of great details. Or, for a quick intro, here's an 80 second video by Photoshop Product Manager, Stephen Nielson:
[IFRAME: see original post]
Photoshop 3D printing support is part of the just updated Photoshop CC, included in your
Creative Cloud
subscription.