Do you mean that you wonder if the 3D viewer would be able to generate such images or view existing images (like the sky texture but also with the other half on ground side)?

Yes I wonder if the online 3D viewer would be able to show the panorama from the images created in Sweet Home 3D (spherical lens).
If there is a solution to see these panoramas directly in the 3D view of Sweet Home 3D with a fully spherical sky, why not?