If doing your own pano and you have missing information to make it a 360 photo for facebook or other social media all you have to do is add a camera and camera model that does 3d photos.
I have used this in the past:
Camera=Ricoh
Camera Model=Ricoh Theta S
So navigate to your finished photo and right click to get to the properties. Scroll down till you see camera and replace it with Ricoh
Replace camera model with Ricoh Theta S
Your final photo size should be no bigger then 10000x5000 as some social media sites will not take large photos.
If uploading to your google account I guess it really does not matter on the size as long its twice as long as high.
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