I bought a fisheye converter for my SLR. Just for a first try I wanted to create a "little planet" panorama. A first quick hack with hugin and 5 pics resulted in this panorama:
It is clear that the nadir and some artefacts have to be corrected. That's not the problem. What is a bit nasty is that black border on the left.
I am absolutely sure, that the source pictures have some part of the ceiling on them. When I move the roll, pitch and yaw angle in live preview, the projection "continues": I can change the center of the image to e.g. the window. Then I can clearly see the ceiling. It just appears as needed.
So hugin knows of tis part, it is not cutted out something like that. Only the first added image (the table on the right) is projected completely. In the preview you can see the problem in advance.
PS: I found out that except for the first image the position offset is not 0. Thos was due to the fact that all pics were taken handheld. On settings these values to 0 I get a complete projection. Is it in gernal impossible to do stereographic projection with offsetted images?