ORIGINAL: Bucko
'Ghost,
See my post in response to your Knife Edge thread on this same topic... The file type must be an equirectangular (spherical) panorama on the order of 8192x4096 or larger. Typically this will involve a stitch of quite a few images in several rows or fewer images shot with very wide angle fisheye lens...
Do some reading of previous posts on this topic, much info is available...
Charlie
Perhaps you are onto what I have been missing (spherical)! I remimber on of the programs I tried having a setting for that. I have been making "Cylinder" type Pano's. They look good but not when imported into G3!