Adding a nadir cap (mirror ball)
I wrote a Photoshop action that produces these mirror spheres out from
a euqirectangular panorama. As you can see are three sizes available.
Small covers 5% ,Big 8% and
XXL 12% of panorama height (equirectangular projection)
Here the action set in Photoshop:
More to come soon...
--Peter Nyfeler (Pitdavos)