For now, Mixed Reality Viewer will continue on with its current name for non-Insiders. If you're enrolled in Skip Ahead, you should be able to check out the revamped 3D Viewer now as an update to ...

Adobe has released Substance 3D Viewer as a free open beta. The tool supports over 70 3D formats and integrates seamlessly with Photoshop for a flexible, non-destructive workflow.