Comment on New forum by Fenton bevan.
Could you put the camera inside the balloon facing up? You could make the balloon clear. You could try different gasses or filters inside the balloon or make it of refractive material. you may also be able to make it into a massive fisheye lens (if a fisheye would be of any use i’m not sure, maybe better to focus on one small area). Like a giant floating eyeball lol.