3D Viewer App in Windows 11/10 opens .3mf files & allows you to open 3D models & then capture it with Mixed Reality video.

However, currently in Paint 3D these controls merely act as a 3D viewer as editing can only be done from the standard side view. Paint 3D's editing limitations can be seen in this tutorial video.

Microsoft is redoing its Mixed Reality Viewer app with a more professional look and feel, along with a rebrand to 3D Viewer. Let's take a closer look.