Newbie question about stereographic

[Fagopher]

I am a new user of Hugin... so let me first say I am very impressed with this tool. Great panoramas and rather quickly.

I successfully created my first few stereographic 360 panoramas (globe type).
I was looking on internet and found a picture where in the center there is a well defined tree but then from the tree trunk/roots, the ground moves circularly and forms the globe. I remember it said it was made with hugin and flexify plugin. I could not find the exact picture again but I found this similar:



I understand flexify is a plugin for photoshop. I do not have photoshop, I use GIMP. Can the same effect be done using Hugin/Gimp combination? How?

Thanks