A couple of months ago, Facebook has introduced a very cool new feature: Richer 3D Posts on Facebook and New Ways to Share. You can now share 3D content in your news feed. However, creating this 3D content was reserved to 3D experts. Hopefully, using the latest version of Paint 3D on Windows 10, anyone can now create its own content!
To share 3D content on Facebook, you must follow their requirements. The 3D assets must be saved using the .GLB file extension (GLB is the binary version of the glTF 2.0 file format). The GLB file must be under 3MB. Facebook is providing this tool to check if your content is ready to be shared: https://developers.facebook.com/tools/3d/validation which seems to be a fork of this one.
You can also read the official documentation associated to Paint 3D.
Once we'll have created your desired 3D content, click on the top left button to expand the menu.
Click on "Export file" then choose "3D – GLB".
Save it on the disk. Go to your Facebook wall and click to create a new post. Then, you simply need to drag'n'drop your saved .GLB file into the right area.
People will be able to see your 3D creation on PC/Mac in any recent browser and on Android and iPhone devices. On smartphones, rotating the device will move the camera around the object and you'll be also able to move using touch to rotate around the Y axis or to pinch to zoom. On desktop, use the mouse or your touch screen if you've got one.
– Poly from Google, which was mainly designed for AR / VR experiences with low-poly (light) 3D objects.
Thanks for reading. Now, feel free to share your awesome 3D creations you'll be able to build for Facebook in the comments section!