I did this 360/VR concept during my workshop at Gameloft in Minsk.
Painting in 360 is a lot of fun.
Also it helps to address a lot of things in one go. Like mood, setting, scale,design and etc.
If you want to learn how to do these
start with my gumroad tutorials.
How to create a panoramic 360/VR painting VOL.1
How to create a panoramic 360/VR painting VOL.2