I HAVE AN CRAZY CRAZY CRAZY CRAZY idea, but I don't know - if you can do that dear dear Taron ....
Thats my suggestion!
What if you had a screen-canvas/sheet that behaves like a space-ball / sphere?! My Imagination the Vervepainter / artist / observer - is like inside in a sphere. The Sphere is the Canvas! But You are in this sphere, you are inside of this sphere

I think this could be very quite useful for easy paintings of 360 ° -180 ° Spheres / panoramas. You should see your as a 180 ° -360 ° seamless panorama, and if you wish, you can change it also by your painting-session into this Panorama.
It would also be the first graphics program in the world, if it could this do?!

Crazy Idea? or sh*t?

it would be the first painting tool in th world - for painting images like that -

...
it haves only two drawbacks: you have distortions in this painting-sphere-mode and you can never see the whole image, if you are in this space-sphere you see a circular image, like from a fisheye-lens with black boarders/edges - but you can switch for flat, into a seamless rect angular
